{"title":"Dell PowerEdge T640 Tower Servers","description":"\u003cp data-start=\"591\" data-end=\"965\"\u003eThe Dell PowerEdge T640 is a high-performance tower server built for businesses that need enterprise-grade power, scalability, and flexibility in an office-friendly form factor. Powered by Intel Xeon Scalable processors, the T640 is designed to handle demanding workloads such as virtualization, large databases, software-defined storage, and business-critical applications.\u003c\/p\u003e\n\u003cp data-start=\"967\" data-end=\"1310\"\u003eWith support for substantial DDR4 ECC memory capacity, the PowerEdge T640 excels in memory-intensive environments where performance and reliability are essential. Its flexible storage configurations—including support for both 3.5” (LFF) and 2.5” (SFF) drives—allow businesses to scale storage capacity and performance as their data needs grow.\u003c\/p\u003e\n\u003cp data-start=\"1312\" data-end=\"1659\"\u003eThe Dell PowerEdge T640 also supports GPU acceleration, making it a strong choice for VDI environments, AI workloads, and applications that benefit from additional processing power. Despite its powerful capabilities, the T640 is engineered for quiet operation, making it suitable for office deployment without the need for a dedicated server room.\u003c\/p\u003e\n\u003cp data-start=\"1661\" data-end=\"1938\"\u003eIntegrated iDRAC9 management enables remote monitoring, deployment, and maintenance, helping IT teams efficiently manage infrastructure while reducing downtime. Its tower design also allows for easy upgrades, giving businesses the flexibility to expand their systems over time.\u003c\/p\u003e\n\u003cp data-start=\"1940\" data-end=\"2217\"\u003eAt Wholesale Servers, all Dell PowerEdge T640 tower servers are fully tested, professionally refurbished, and built to order. Customize your system with the right CPUs, memory, storage, GPU options, and RAID configuration to meet your exact performance and budget requirements.\u003c\/p\u003e\n\u003cp data-start=\"2219\" data-end=\"2432\"\u003eIf you need a powerful, scalable tower server that delivers enterprise-level performance in an office-friendly design, the Dell T640 is an excellent solution for SMBs, branch offices, and advanced IT environments.\u003c\/p\u003e","products":[{"product_id":"dell-t640-8-bay-3-5-chassis","title":"Dell PowerEdge T640 8-Bay 3.5\" Drives [14th Gen]","description":"\u003cp\u003eThe refurbished Dell PowerEdge T640 8-Bay 3.5\" is the 14th gen flagship tower server: a 5U dual-socket platform carrying the full enterprise envelope (24 DIMM slots symmetric, up to 8 PCIe Gen3 slots, up to four 300W GPUs, NVDIMM-N persistent memory, and up to 2400W power supplies) in a tower chassis built for office and remote-site deployments that need datacenter-class compute without rack infrastructure. The 8-Bay 3.5\" configuration is the one we reach for when bulk LFF capacity is the storage priority: eight hot-swap 3.5\" front bays for SAS, SATA, or Nearline SAS drives alongside the platform's flagship compute envelope.\u003c\/p\u003e\u003cp\u003eThis is the right tower for branch-office virtualization hosts running 30 to 60 VMs, remote-site SQL or Exchange servers that need serious capacity, modest GPU-accelerated workloads such as CAD, inference, and VDI in office environments, and any deployment where rack space is unavailable but datacenter-class platform headroom is required. In positioning it is the tower equivalent of the R740 and R740xd: same socket, same memory topology, same PCIe envelope, same iDRAC9, in a rack-convertible tower chassis.\u003c\/p\u003e\u003cp\u003eTo configure a build, call 1-800-778-1545 or use the quote form on this page and we will respond within 24 hours. Every refurbished T640 ships after a 12+ hour burn-in covering every memory channel, every PCIe slot, and every drive bay, backed by our standard 180-day warranty with 1-Year, 2-Year, and 3-Year Premium options available. Volume pricing applies at 5 units and above.\u003c\/p\u003e\u003ch2\u003eWhere the T640 8-Bay 3.5\" Fits in the Family\u003c\/h2\u003e\u003cp\u003eThe T640 sits at the top of Dell's 14th gen PowerEdge tower line, above the entry-tier \u003ca href=\"\/products\/dell-poweredge-t340-8-bay-lff-build-your-own\"\u003eDell PowerEdge T340 8-Bay 3.5\" entry tower\u003c\/a\u003e (single-socket, modest envelope) and the mid-range \u003ca href=\"\/products\/dell-poweredge-t440-8-bay-lff-build-your-own\"\u003eDell PowerEdge T440 8-Bay 3.5\" tower\u003c\/a\u003e (dual-socket, 16-DIMM asymmetric memory, 1 TB ceiling, single GPU). The T640 is the only 14th gen tower with the full flagship platform: 24 symmetric DIMM slots, a 3 TB memory ceiling, four-GPU support, eight PCIe Gen3 slots, and NVDIMM-N persistent memory.\u003c\/p\u003e\u003cp\u003eWithin the T640 chassis line we stock two configurations: this 8-Bay 3.5\" LFF variant for bulk capacity, and the \u003ca href=\"\/products\/dell-t640-16-bay-2-5-chassis\"\u003eDell PowerEdge T640 16-Bay 2.5\" SFF configuration\u003c\/a\u003e for IOPS-leaning, higher-VM-density workloads. The platform underneath is identical; the difference is the storage profile. Choose this 8-Bay LFF for file serving, capacity-tier databases, backup repositories, or a four-GPU build that also needs bulk local storage. Choose the 16-Bay 2.5\" SFF when transaction IOPS, high VM count, or optional NVMe matter more than raw capacity.\u003c\/p\u003e\u003ch2\u003eStorage: 8 x 3.5\" LFF Bays for Flagship-Tier Tower Capacity\u003c\/h2\u003e\u003cp\u003eThe 8-Bay 3.5\" chassis provides eight front-accessible hot-swap 3.5\" drive bays for SAS, SATA, or Nearline SAS drives. The backplane is SAS\/SATA only; this LFF chassis does not support front NVMe (NVMe lives on the 16-Bay 2.5\" and specialist 24-Bay 2.5\" variants). With eight 22 TB Nearline SAS drives, raw capacity reaches 176 TB; in RAID 6 with one hot spare, usable capacity lands near 110 TB. That is real bulk-storage density backed by the T640's flagship compute envelope, which matters when the tower does more than serve files: dense VM hosting with capacity-tier storage, SQL databases with multi-TB data sets, and application servers with large content stores.\u003c\/p\u003e\u003cp\u003eFor boot, the T640 uses a BOSS PCIe card (Boot Optimized Storage Solution) at the rear of the system: up to two 80 mm or 110 mm M.2 SATA devices in hardware RAID 1, the same BOSS-S1 module used across the R740 and R740xd. Putting the OS on BOSS keeps all eight front bays free for data and removes the OS from the data array entirely. IDSDM (Internal Dual SD Module) and an internal USB option exist for hypervisor-only boot, but BOSS is the right call for production. BOSS drives are cold-swap on this platform; replacement requires downtime.\u003c\/p\u003e\u003cp\u003eDrive guidance for the 8-Bay 3.5\": for bulk capacity we spec 12 TB, 16 TB, 20 TB, or 22 TB Nearline SAS 7.2K drives. RAID 6 is mandatory on any array of 8 TB and larger drives, because the rebuild window on large NL-SAS arrays carries real double-disk-failure risk. For mixed workloads, a SAS SSD pair (1.92 TB or 3.84 TB) for cache or hot data alongside six NL-SAS bulk drives is a clean layout. External SAS shelf expansion is supported through the H840 external controller for deployments that outgrow eight bays.\u003c\/p\u003e\u003ch2\u003eStorage Controllers: PERC H740P Is the Default\u003c\/h2\u003e\u003cp\u003eThe T640 supports the standard 14th gen flagship PERC family in a dedicated controller slot that keeps all eight PCIe expansion slots free:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H740P\u003c\/strong\u003e (8 GB NV cache, battery-backed): the production default for write-intensive or mixed read\/write workloads on this chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H730P\u003c\/strong\u003e (2 GB NV cache, battery-backed): solid general-purpose choice for read-leaning workloads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H330\u003c\/strong\u003e (no cache): entry-tier hardware RAID for light workloads only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHBA330\u003c\/strong\u003e (pass-through HBA): for software-defined storage stacks such as Storage Spaces Direct, Ceph, and ZFS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC S140\u003c\/strong\u003e (software RAID via the C620 chipset): dev and test only. We do not quote S140 for production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H840\u003c\/strong\u003e (external, 8 GB cache): for SAS shelf expansion beyond the internal eight bays.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor the 8-Bay 3.5\" our default recommendation is the PERC H740P. The 8 GB non-volatile cache earns its place on bulk-capacity workloads with mixed read\/write patterns: backup-target ingest, file-server cold writes, and modest database transaction logging. For software-defined storage builds the HBA330 pass-through is the right call; the T640's eight PCIe slots make it workable as a tower hyperconverged node, though for serious clustered storage we still point customers to rack platforms.\u003c\/p\u003e\u003ch2\u003eProcessors: 14th Gen Skylake-SP and Cascade Lake-SP\u003c\/h2\u003e\u003cp\u003eThe T640 is built on Intel's LGA 3647 socket and takes up to two Xeon Scalable processors from the 1st generation Skylake-SP family or the 2nd generation Cascade Lake-SP family. Same socket, drop-in compatible with a BIOS update. For any new T640 deployment in 2026 we spec 2nd gen Cascade Lake: better performance per watt, hardware Spectre and Meltdown mitigations, and access to the widely available Refresh SKUs (Gold 6230R, Gold 6248R, Gold 6258R).\u003c\/p\u003e\u003cp\u003eThe platform supports up to 28 cores per socket (Platinum 8280) and accepts CPUs up to 205W TDP, meaningfully higher than the T440's 150W mainstream ceiling. Common specs: the \u003cstrong\u003eGold 6230\u003c\/strong\u003e (20 cores, 2.1 GHz, 125W) for balanced virtualization and database workloads; the \u003cstrong\u003eGold 6248R\u003c\/strong\u003e (24 cores, 3.0 GHz, 205W) where clock speed matters; and the \u003cstrong\u003ePlatinum 8280\u003c\/strong\u003e (28 cores, 2.7 GHz, 205W) for maximum-density VM hosting. Dual Gold 6248R is a common build for serious tower virtualization.\u003c\/p\u003e\u003cp\u003eFor the 8-Bay 3.5\" specifically, the LFF bays bias the deployment toward bulk-capacity workloads where memory and storage matter more than raw core count, so dual Gold 6230 (40 cores total) is our most common spec, stepping to dual Gold 6248R (48 cores) for compute-heavier mixes. The T640's thermal envelope genuinely supports dual 205W CPUs without acoustic compromise; the chassis was designed for serious dual-socket operation and ships with the high-performance heatsinks those CPUs require. Single-socket configurations are supported but cut memory to 12 DIMMs and PCIe to three slots, which is rarely the right call on a flagship-tier tower; if single-socket is enough, the T440 is the better-positioned platform.\u003c\/p\u003e\u003ch2\u003eMemory: 24 DIMMs Symmetric, Up to 3 TB\u003c\/h2\u003e\u003cp\u003eThe T640 has 24 DDR4 DIMM slots in a fully symmetric topology: CPU1 owns 12 slots, CPU2 owns 12 slots, six channels per CPU at two DIMMs per channel. This is the same flagship memory topology as the R740 and R740xd, and a real upgrade over the T440's asymmetric 10-plus-6 layout. Symmetric population gives NUMA-aware applications balanced per-socket bandwidth, which matters for VM density, large databases, and analytics.\u003c\/p\u003e\u003cp\u003eMemory speed reaches \u003cstrong\u003e2933 MT\/s at 1 DIMM per channel on Cascade Lake\u003c\/strong\u003e, dropping to \u003cstrong\u003e2666 MT\/s at 2 DIMMs per channel\u003c\/strong\u003e under full population; mixed-speed configurations run at the slowest installed DIMM. Skylake-SP tops out at 2666 MT\/s regardless. The 2933 ceiling at 1 DPC is a genuine delta over the T440's flat 2666 MT\/s and matters for memory-bandwidth-sensitive workloads.\u003c\/p\u003e\u003cp\u003eMaximum memory is \u003cstrong\u003e3 TB with 24 x 128 GB LRDIMMs\u003c\/strong\u003e (3DS); with 64 GB LRDIMMs or 64 GB RDIMMs the ceiling is 1.5 TB; single-socket configurations max at 1.5 TB across 12 DIMMs. We typically ship T640 systems in the 384 GB to 768 GB range for tower virtualization, stepping to 1.5 TB for serious VM density. The 3 TB ceiling is rarely needed outside in-memory database workloads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNVDIMM-N persistent memory is supported\u003c\/strong\u003e: up to 12 x 16 GB NVDIMM-N modules (one per channel), totaling 192 GB of persistent memory. It requires both CPUs installed and follows specific population rules (NVDIMM-N may be mixed with RDIMM but not with LRDIMM). NVDIMM-N is genuine storage-class memory, flash-backed with a backup battery so data survives power events. This is unique to the T640 in Dell's tower line; the T440, T550, and T560 support no persistent memory in any form. For tower deployments running write-intensive transactional databases, SAP HANA, or Storage Spaces Direct with a persistent metadata tier, NVDIMM-N is the platform-justifying feature.\u003c\/p\u003e\u003ch2\u003eNetworking and PCIe Expansion\u003c\/h2\u003e\u003cp\u003eThe T640 ships with two onboard 10 GbE BASE-T LOM ports (Broadcom 57416), a meaningful step up from the T440's 2 x 1 GbE baseline. On a flagship-tier tower, 10 GbE is the standard rather than an upsell, and it is enough for most SMB and remote-site virtualization with iSCSI or NFS storage networking without adding a PCIe NIC.\u003c\/p\u003e\u003cp\u003eFor more, the T640 takes rNDC (rack Network Daughter Card) options including dual 10 GbE SFP+, dual 25 GbE SFP28 (Mellanox ConnectX-4 Lx), and quad-port 1 GbE. The chassis carries \u003cstrong\u003eup to 8 PCIe Gen3 expansion slots plus a dedicated PERC slot\u003c\/strong\u003e with both CPUs installed; single-CPU configurations expose only 3 PCIe slots. That slot count is a real advantage over the T440's five slots and leaves room for 10\/25\/40\/100 GbE NICs, HBAs, and GPUs together. For dense virtualization we typically pair the onboard 10 GbE with a 25 GbE Mellanox ConnectX-4 Lx card.\u003c\/p\u003e\u003ch2\u003eGPU Support: Up to Four 300W Accelerators\u003c\/h2\u003e\u003cp\u003eThe T640 supports \u003cstrong\u003eup to four 300W GPU accelerators\u003c\/strong\u003e, the strongest GPU envelope of any Dell tower in any generation (the 15th gen T550 maxes at two; the 16th gen T560 supports up to six but at lower per-GPU power). The four-GPU configuration is a chassis-level option that must be specified at purchase, because it requires specific cooling and PCIe routing that cannot be retrofitted. Qualified cards have included the NVIDIA Tesla V100, T4, A10, A30, A40, A100, and RTX series, plus AMD MI-series accelerators; the qualified-card list shifts over time, so we confirm it at quote time.\u003c\/p\u003e\u003cp\u003eOne platform constraint matters: with NVMe storage configurations the GPU ceiling drops to two cards. The 8-Bay 3.5\" chassis is SAS\/SATA only, so the full four-GPU envelope is available here. If a deployment needs both NVMe storage and four GPUs, the platform forces a choice and a rack platform is the better answer. The four-GPU envelope makes this chassis a real option for office-deployed GPU work: branch AI and ML inference, CAD render nodes for engineering offices, dense VDI (60 to 100 light desktops per host), and modest on-prem ML training. This is the T640's strongest differentiator over the single-GPU T440 and the clearest reason to choose tower over rack when the deployment specifically needs office-deployable multi-GPU compute.\u003c\/p\u003e\u003ch2\u003eManagement: iDRAC9 Generation\u003c\/h2\u003e\u003cp\u003eOut-of-band management is iDRAC9, standard across 14th gen PowerEdge. We recommend the \u003cstrong\u003eiDRAC9 Enterprise license\u003c\/strong\u003e for any production T640: virtual console redirection, virtual media, automated firmware updates through the Lifecycle Controller, group management via OpenManage Enterprise, and SupportAssist proactive diagnostics. iDRAC9 Express lacks virtual console and is insufficient for remote troubleshooting at branch or unattended sites, which is exactly where flagship towers tend to live.\u003c\/p\u003e\u003cp\u003eThe platform carries the full iDRAC9 security baseline: TPM 2.0, cryptographically signed firmware, Silicon Root of Trust, Secure Boot, System Lockdown (Enterprise plus OpenManage Enterprise), Quick Sync 2.0 mobile management, and System Erase data sanitization. For remote-site deployments with limited on-site IT, iDRAC9 Enterprise is the single most useful line on the BOM: remote console is what saves a site visit when something breaks.\u003c\/p\u003e\u003ch2\u003ePower and Cooling\u003c\/h2\u003e\u003cp\u003eThe T640 supports a broader PSU range than any other Dell tower in our catalog. All are hot-plug and support redundant 1+1 operation:\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003ePSU Recommendation\u003c\/th\u003e\n\u003cth\u003eEst. Peak Draw\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight (Gold 6230, 256 GB RAM, 4 NL-SAS, no GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 750W Platinum\u003c\/td\u003e\n\u003ctd\u003e~420W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalanced (dual Gold 6230, 512 GB RAM, 8 NL-SAS, no GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 1100W Platinum\u003c\/td\u003e\n\u003ctd\u003e~640W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeavy (dual Gold 6248R, 768 GB RAM, 8 NL-SAS, 2x 300W GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 1600W Platinum\u003c\/td\u003e\n\u003ctd\u003e~1450W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum (dual Platinum 8280, 1.5 TB RAM, 8 NL-SAS, 4x 300W GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 2400W Platinum\u003c\/td\u003e\n\u003ctd\u003e~2100W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThe 750W pair handles non-GPU light builds; 1100W is the right default for dual-socket Gold-tier compute without GPUs; 1600W is required for two-GPU configurations; 2400W is required for four-GPU configurations. The 2000W and 2400W PSUs derate at low line (100 to 120V AC), so any two-GPU-or-greater build should run on 200 to 240V AC for full output. Dual hot-plug redundant Platinum PSUs are mandatory for production; Titanium-tier SKUs are available where efficiency targets call for them. Cooling uses a redundant fan configuration, which is what lets the chassis carry dual high-TDP CPUs and multi-GPU loads while staying office-acceptable in most builds. Four-GPU plus dual 205W CPU configurations will run noticeably louder.\u003c\/p\u003e\u003ch2\u003ePhysical Specs \u0026amp; Platform Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e 5U tower, rack-convertible with the optional rack conversion kit. Chassis depth roughly 726 mm; loaded weight near 35 kg with eight LFF drives and two PSUs. In rack mode it consumes 5U.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe expansion:\u003c\/strong\u003e up to 8 PCIe Gen3 slots plus a dedicated PERC slot with both CPUs installed; slots 4 through 8 require the second processor, and single-CPU builds expose only 3 slots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParts availability:\u003c\/strong\u003e excellent. The T640 shares its platform, PERC family, BOSS module, iDRAC9, and PSUs with the high-volume R740 and R740xd, so spares and field-replaceable units are mature and widely stocked. Dell ProSupport on 14th gen is approaching end of extended support, so third-party maintenance is the standard production support path in 2026.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessories we recommend:\u003c\/strong\u003e the BOSS-S1 boot card for production boot; the rack conversion kit if rack deployment is planned (sold separately, add it to the BOM up front); the iDRAC9 Enterprise license; and a 25 GbE Mellanox ConnectX-4 Lx NIC for dense virtualization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform notes:\u003c\/strong\u003e the LFF backplane is SAS\/SATA only (no front NVMe on this chassis); BOSS is cold-swap; four-GPU support must be ordered at build time and cannot be retrofitted; and the four-GPU and NVMe options are mutually exclusive on the platform.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOur Assessment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhere it excels:\u003c\/strong\u003e the T640 8-Bay 3.5\" is the right call when a deployment needs the flagship platform envelope (24 symmetric DIMMs, 3 TB memory, four GPUs, eight PCIe slots, NVDIMM-N) in a tower form factor with bulk LFF capacity as the storage priority. It is strong for branch-office virtualization hosts running 30 to 60 VMs with capacity-tier storage, remote-site SQL and Exchange servers with serious data sets, office-deployed GPU work (CAD, AI inference, dense VDI), and persistent-memory-aware workloads that need NVDIMM-N in a tower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere to look instead:\u003c\/strong\u003e if rack space is available and tower form factor is not required, the R740xd is the same platform in 2U and generally a better datacenter fit. If the workload fits a smaller envelope and budget is the constraint, the T440 is meaningfully cheaper and right-sized. If IOPS or NVMe matter more than bulk capacity, the T640 16-Bay 2.5\" SFF configuration is the better choice on the same platform. All three are linked in the sections above and below.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBottom line:\u003c\/strong\u003e this is the 14th gen tower to buy when you need flagship-tier platform headroom, want bulk LFF capacity, and require a tower form factor for office acoustics or sites with no rack. It is the last Dell tower built at the 24-DIMM, four-GPU, NVDIMM-N envelope, and there is no direct successor at that tier in 15th or 16th gen. If your deployment does not need the flagship envelope, we will tell you the T440 is the smarter buy; if you have rack space, we will point you to the R740xd. That is the call we make at quote time.\u003c\/p\u003e\u003ch2\u003eWhere the T640 Fits in 2026\u003c\/h2\u003e\u003cp\u003eThe T640 succeeds the 13th gen \u003ca href=\"\/products\/dell-poweredge-t630-tower-8-bay-lff-chassis\"\u003eDell PowerEdge T630 8-Bay 3.5\" (13th gen flagship tower)\u003c\/a\u003e (Broadwell, iDRAC8, 24 DIMMs at 2400 MT\/s, two-GPU envelope, no NVMe). Moving up to the T640 brings the Skylake and Cascade Lake architecture, iDRAC9 with Silicon Root of Trust, faster memory at 2933 MT\/s, four-GPU support, BOSS internal boot, and eight PCIe Gen3 slots. Buying a refurbished T630 in 2026 saves a little but gives up real platform value.\u003c\/p\u003e\u003cp\u003eThere is no direct flagship-tower successor in 15th or 16th gen. The 15th gen T550 tops out at 16 DDR DIMM slots (2 TB max) and two GPUs but brings PCIe Gen4 and 3rd Gen Xeon. The 16th gen \u003ca href=\"\/products\/dell-poweredge-t560-12-bay-3-5-chassis\"\u003eDell PowerEdge T560 12-Bay 3.5\" (16th gen tower)\u003c\/a\u003e moves to DDR5 at up to 4800 MT\/s, PCIe Gen5, and BOSS-N1 NVMe boot, and supports up to six GPUs, but carries only 16 DDR5 DIMM slots (1 TB max) and no NVDIMM-N. For deployments that genuinely need 24 DIMMs, 3 TB of memory, or NVDIMM-N in a tower, the T640 is still the answer in 2026, and it is the last Dell tower built at that envelope. On support: Dell ProSupport for 14th gen is near end of extended support, so plan production coverage around third-party maintenance.\u003c\/p\u003e\u003ch2\u003eHonest Limitations\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe Gen3 ceiling.\u003c\/strong\u003e No Gen4 or Gen5 expansion. Modern Gen4 NICs and HBAs run at roughly half native bandwidth; H100, L40S, and other Gen4\/Gen5 GPUs are throttled by the bus. Match GPUs to the platform: V100, T4, A10, A30, A40, and A100 are well-suited; H100 and Gen5 cards are bottlenecked.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo front NVMe on this chassis.\u003c\/strong\u003e The 8-Bay 3.5\" backplane is SAS\/SATA only. NVMe lives on the 16-Bay 2.5\" configuration and specialist 24-Bay variants. For NVMe storage in a tower, choose the 16-Bay 2.5\" or move to rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour GPUs and NVMe are mutually exclusive.\u003c\/strong\u003e Per Dell's platform spec, NVMe configurations cap GPUs at two. This LFF chassis supports the full four-GPU envelope precisely because it has no NVMe; if both matter, the platform forces a choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-socket loses half the platform.\u003c\/strong\u003e Single-CPU T640 builds expose only 12 DIMMs and 3 PCIe slots. Single-socket is rarely the right call here; the T440 is better-positioned for single-socket tower needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2400W PSU derates at low line.\u003c\/strong\u003e Two-GPU-or-greater builds should run on 200 to 240V AC. At 100 to 120V AC the top PSUs derate and may force a lower-spec build.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5U footprint is large.\u003c\/strong\u003e Rack-converted, the T640 consumes 5U against the R740xd's 2U. For rack-dense sites the rack platforms are better-positioned; the tower makes sense for office and remote-site deployments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBOSS is cold-swap.\u003c\/strong\u003e Boot-module replacement needs downtime. Hot-swap boot arrived with 15th gen (BOSS-S2) and NVMe boot with 16th gen (BOSS-N1).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eiDRAC9 Express is insufficient for production.\u003c\/strong\u003e Always add Enterprise, especially at unattended sites. Remote console is the feature you miss most when something breaks with no on-site IT.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVDIMM-N has population rules.\u003c\/strong\u003e Persistent-memory builds need both CPUs, cannot mix NVDIMM-N with LRDIMM, and require OS support for storage-class memory (Windows Server 2016 and later with the right drivers, or Linux with libnvdimm). Confirm at deployment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack rails are a separate line item.\u003c\/strong\u003e The chassis is rack-convertible but the kit is not included. Add it to the BOM if rack deployment is planned.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWorkload Fit\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat the T640 8-Bay 3.5\" Excels At\u003c\/th\u003e\n\u003cth\u003eConsider Alternatives For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBranch-office virtualization (30 to 60 VMs with capacity storage)\u003c\/td\u003e\n\u003ctd\u003eSMB\/ROBO under the T440 envelope (use the T440)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote-site SQL, Exchange, and database servers with large data sets\u003c\/td\u003e\n\u003ctd\u003eDatacenter rack deployments (use the R740xd)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOffice-deployed multi-GPU compute (AI inference, CAD, dense VDI)\u003c\/td\u003e\n\u003ctd\u003eBulk SFF or IOPS-leaning workloads (use the 16-Bay 2.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVDIMM-N persistent-memory tower deployments\u003c\/td\u003e\n\u003ctd\u003eNVMe storage requirements (16-Bay 2.5\" or rack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTower file servers backed by serious compute (24 DIMMs, 3 TB max)\u003c\/td\u003e\n\u003ctd\u003eCurrent-gen GPU compute at scale (R750xa, R760xa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTower hyperconverged nodes (Storage Spaces Direct, ZFS, modest Ceph)\u003c\/td\u003e\n\u003ctd\u003eDDR5 memory-bandwidth-bound workloads (T560, R760)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhere to Look Instead\u003c\/h2\u003e\u003cp\u003eIf your deployment does not fit the T640 8-Bay 3.5\", these are the configurations we point customers to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-poweredge-r740xd-12-bay-3-5-chassis\"\u003eDell PowerEdge R740xd 12-Bay 3.5\" rack server\u003c\/a\u003e: the same 14th gen platform in a 2U datacenter form factor with greater storage density and broader NVMe options. The better fit whenever rack space is available.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-poweredge-r650-8-bay-2-5-build-your-own\"\u003eDell PowerEdge R650 8-Bay 2.5\" (15th gen rack)\u003c\/a\u003e: a generation newer, with Ice Lake CPUs, DDR4 at 3200 MT\/s, and PCIe Gen4, for deployments that want a current-tier rack platform rather than a 14th gen tower. For the SFF version of this T640 platform, the 16-Bay 2.5\" configuration linked above is the companion to consider.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eReady to Configure?\u003c\/h2\u003e\u003cp\u003eTell us your workload, target memory capacity, drive count and capacity per drive, single-socket or dual-socket, whether GPU acceleration is needed and how many cards, and whether NVDIMM-N persistent memory is in scope. We will translate that into a specific build and a firm quote.\u003c\/p\u003e\u003cp\u003eCall 1-800-778-1545 or submit the quote form on this page and we will respond within 24 hours. Every T640 we ship is tested with a 12+ hour burn-in and backed by a 180-day warranty, with extended 1-Year, 2-Year, and 3-Year Premium coverage available. Volume pricing applies at 5 units and above.\u003c\/p\u003e","brand":"Dell","offers":[{"title":"Default Title","offer_id":45951241748679,"sku":"B-002726","price":4094.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/4493\/0247\/files\/dell-poweredge-t640-8-bay-35-build-your-own-server-352896.jpg?v=1765539623"},{"product_id":"dell-t640-16-bay-2-5-chassis","title":"Dell PowerEdge T640 16-Bay 2.5\" Drives [14th Gen]","description":"\u003cp\u003eThe refurbished Dell PowerEdge T640 16-Bay 2.5\" is the SFF density configuration of Dell's 14th gen flagship tower: sixteen 2.5\" hot-swap bays on the same dual-socket Cascade Lake platform as the 8-Bay 3.5\" build, with the option to configure up to eight of those bays as NVMe. This is the variant we reach for when a deployment needs flagship tower compute paired with SFF storage density, IOPS-leaning workloads such as transactional databases, dense VM hosting, and VDI, or NVMe storage in a tower form factor.\u003c\/p\u003e\u003cp\u003eWe deploy this most often as serious branch-office virtualization hosts running 50-plus VMs with SFF storage tiers, tower-deployed transactional database servers (SQL, Oracle, PostgreSQL with multi-TB working sets), modest VDI deployments (40 to 80 desktops with NVMe boot tiers), tower hyperconverged nodes running Storage Spaces Direct or modest Ceph clusters, and persistent-memory-aware workloads that combine NVDIMM-N with NVMe storage tiers. The platform underneath is the full 14th gen flagship: 24 symmetric DIMM slots, a 3 TB memory ceiling, eight PCIe Gen3 slots, iDRAC9, and NVDIMM-N persistent memory.\u003c\/p\u003e\u003cp\u003eTo configure a build, call 1-800-778-1545 or use the quote form on this page and we will respond within 24 hours. Every refurbished T640 ships after a 12+ hour burn-in covering every memory channel, every PCIe slot, and every drive bay, backed by our standard 180-day warranty with 1-Year, 2-Year, and 3-Year Premium options available. Volume pricing applies at 5 units and above.\u003c\/p\u003e\u003ch2\u003eWhen 16 SFF Bays Is the Right Choice\u003c\/h2\u003e\u003cp\u003eThe choice between the two T640 chassis is a storage-profile and GPU-envelope decision, not a tier decision: both carry the identical flagship platform. The 16-Bay 2.5\" is the right pick when IOPS, drive count, or NVMe support matter more than raw capacity per dollar. Against the \u003ca href=\"\/products\/dell-t640-8-bay-3-5-chassis\"\u003eDell PowerEdge T640 8-Bay 3.5\" tower\u003c\/a\u003e, this variant trades bulk LFF capacity for sixteen SFF bays and one capability the 8-Bay does not have at all: optional NVMe.\u003c\/p\u003e\u003cp\u003eThat NVMe option carries a platform tradeoff worth stating up front. On the T640, NVMe configurations cap GPU support at two cards; SAS\/SATA-only configurations keep the full four-GPU envelope, because the PCIe lane budget forces the choice. So the decision between the two T640 chassis comes down to what the workload values more: bulk LFF capacity with the full four-GPU envelope (the 8-Bay 3.5\"), or SFF density with optional NVMe at a two-GPU ceiling (this 16-Bay 2.5\"). Everything else (processors, memory topology, memory speed, RAID family, management, boot, power range, form factor) is identical between the two.\u003c\/p\u003e\u003ch2\u003eStorage: 16 SFF Bays with Optional NVMe\u003c\/h2\u003e\u003cp\u003eThe 16-Bay 2.5\" chassis provides sixteen front-accessible hot-swap 2.5\" bays for SAS, SATA, or optional NVMe drives. The IOPS envelope is meaningfully higher than the 8-Bay LFF build: more spindles, lower seek times on 10K SAS, and the option to step up to all-SSD or NVMe where the workload demands it. Representative capacities: sixteen 3.84 TB SAS SSDs give 61 TB raw (about 40 TB usable in RAID 6); sixteen 7.68 TB SAS SSDs give 122 TB raw; sixteen 2.4 TB 10K SAS drives give 38 TB raw at much higher IOPS than Nearline SAS. Four storage architectures we ship most often:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-SAS\/SATA SSD density:\u003c\/strong\u003e sixteen 1.92 TB or 3.84 TB SAS SSDs in RAID 10 or two RAID 6 groups, 15 to 50 TB usable depending on drive size and RAID level. The most common build: clean IOPS for dense VM hosting and transactional databases, with the option of dual high-TDP CPUs and the full four-GPU envelope alongside. PERC H740P is the default controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSSD cache plus HDD capacity tier:\u003c\/strong\u003e two to four SAS SSDs in RAID 1 or RAID 10 for hot data, twelve to fourteen 2.4 TB 10K SAS drives in RAID 6 for capacity, 25 to 35 TB usable. A strong balance of IOPS for hot data and capacity for bulk content.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVMe plus SAS hybrid (up to 8 NVMe):\u003c\/strong\u003e eight NVMe drives (1.6 TB, 3.2 TB, or 6.4 TB Dell-qualified SSDs) in dedicated front bays plus eight SAS\/SATA drives. NVMe bypasses the PERC and connects directly to CPU PCIe lanes for low-latency IOPS. The build we ship for heavy OLTP SQL, Exchange with large mailbox stores, and VDI boot tiers. GPU support caps at two cards in this configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-NVMe (specialist 24-Bay variant):\u003c\/strong\u003e the platform supports an all-NVMe 24-Bay 2.5\" specialist chassis we do not stock as a separate SKU. If all-NVMe tower deployment is the requirement, contact us for sourcing; for datacenter all-NVMe, rack platforms are better-positioned.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor boot, the T640 uses a BOSS PCIe card (dual mirrored M.2 SATA in hardware RAID 1, cold-swap), keeping the OS off the sixteen front bays. We specify BOSS on every production build. RAID guidance differs from the 8-Bay LFF: with sixteen SAS drives, RAID 6 with two hot spares (14 in the set plus 2 spares) is a clean default; RAID 10 across 14 drives gives stronger write IOPS at half the usable capacity and is our recommendation for write-heavy SQL or Exchange. RAID 5 is acceptable on short-rebuild SSD arrays, but we default to RAID 6 for production unless the IOPS budget specifically calls for RAID 10. NVMe drives are not behind the PERC, so NVMe RAID is OS-level (Storage Spaces, ZFS, mdraid); OS choice drives the NVMe storage architecture.\u003c\/p\u003e\u003ch2\u003eStorage Controllers\u003c\/h2\u003e\u003cp\u003eThe 16-Bay 2.5\" supports the full 14th gen flagship PERC family in a dedicated controller slot that leaves all eight PCIe slots free:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H740P\u003c\/strong\u003e (8 GB NV cache, battery-backed): our top pick for SAS\/SATA on this variant, and the right default for the IOPS-leaning workloads it targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H730P\u003c\/strong\u003e (2 GB NV cache, battery-backed): general-purpose for read-leaning mixes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H330\u003c\/strong\u003e (no cache): light workloads only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHBA330\u003c\/strong\u003e (pass-through HBA): for Storage Spaces Direct, Ceph, and ZFS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC S140\u003c\/strong\u003e (software RAID via the C620 chipset): dev and test only. We do not quote S140 for production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePERC H840\u003c\/strong\u003e (external, 8 GB cache): for SAS shelf expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOne thing specific to this chassis: NVMe drives do not sit behind the PERC. In NVMe configurations the NVMe bays connect directly to CPU PCIe lanes, so hardware RAID across NVMe is not available on this platform (NVMe hardware RAID arrives with the 16th gen H965i lineage). Plan NVMe redundancy at the OS layer.\u003c\/p\u003e\u003ch2\u003eProcessors: 14th Gen Skylake-SP and Cascade Lake-SP\u003c\/h2\u003e\u003cp\u003eUp to two Intel Xeon Scalable processors on the LGA 3647 socket, 1st gen Skylake-SP or 2nd gen Cascade Lake-SP, drop-in compatible with a BIOS update. For new deployments in 2026 we spec 2nd gen Cascade Lake for the performance per watt and the widely available Refresh SKUs (Gold 6230R, Gold 6248R, Gold 6258R). Up to 28 cores per socket (Platinum 8280) and CPUs up to 205W TDP.\u003c\/p\u003e\u003cp\u003eFor the 16-Bay 2.5\" specifically, the IOPS-leaning workload mix (dense VM hosting, transactional databases) usually justifies more cores than the bulk-capacity 8-Bay build, so our default is the \u003cstrong\u003eGold 6248R\u003c\/strong\u003e (24 cores, 3.0 GHz, 205W) or the \u003cstrong\u003ePlatinum 8280\u003c\/strong\u003e (28 cores, 2.7 GHz, 205W) for maximum VM density. The chassis carries the high-performance heatsinks those 205W CPUs require. Single-socket builds are supported but cut memory to 12 DIMMs and PCIe to three slots; on a flagship tower that is rarely the right call, and the T440 is better-positioned for single-socket needs.\u003c\/p\u003e\u003ch2\u003eMemory: 24 DIMMs Symmetric, Up to 3 TB\u003c\/h2\u003e\u003cp\u003e24 DDR4 DIMM slots in a fully symmetric topology (12 per CPU, six channels at two DIMMs per channel). Speed reaches \u003cstrong\u003e2933 MT\/s at 1 DIMM per channel on Cascade Lake\u003c\/strong\u003e, dropping to 2666 MT\/s at 2 DPC under full population; Skylake-SP is 2666 MT\/s throughout. Maximum 3 TB with 24 x 128 GB LRDIMMs (3DS), 1.5 TB with 64 GB DIMMs. For the VM-host and database workloads this variant targets, 768 GB to 1.5 TB is the typical configuration we ship.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNVDIMM-N persistent memory is supported\u003c\/strong\u003e: up to 12 x 16 GB modules (192 GB), requiring both CPUs and following specific population rules (mixable with RDIMM, not with LRDIMM). On the 16-Bay 2.5\" this pairs naturally with the NVMe storage option for transactional workloads that want both a persistent metadata tier and low-latency NVMe data. Persistent memory is unique to the T640 in Dell's tower line.\u003c\/p\u003e\u003ch2\u003eNetworking and PCIe Expansion\u003c\/h2\u003e\u003cp\u003eTwo onboard 10 GbE BASE-T LOM ports (Broadcom 57416) are standard, sufficient for most SMB and remote-site virtualization with iSCSI or NFS storage networking. rNDC options add dual 10 GbE SFP+, dual 25 GbE SFP28 (Mellanox ConnectX-4 Lx), or quad 1 GbE. For serious virtualization on this variant we typically add a 25 GbE Mellanox ConnectX-4 Lx PCIe card.\u003c\/p\u003e\u003cp\u003eThe chassis carries \u003cstrong\u003eup to 8 PCIe Gen3 slots plus a dedicated PERC slot\u003c\/strong\u003e with both CPUs installed; slots 4 through 8 require the second processor, and single-CPU builds expose only 3 slots. On the 16-Bay 2.5\" the PCIe lane budget is where the NVMe-versus-GPU tradeoff lives: NVMe front bays consume lanes that would otherwise feed GPU slots, which is why NVMe configurations cap GPUs at two.\u003c\/p\u003e\u003ch2\u003eGPU Support: Up to Four GPUs (Two with NVMe)\u003c\/h2\u003e\u003cp\u003eIn SAS\/SATA-only configurations the 16-Bay 2.5\" supports the full \u003cstrong\u003efour 300W GPU envelope\u003c\/strong\u003e, matching the 8-Bay 3.5\" build and far ahead of the single-GPU T440. \u003cstrong\u003eNVMe configurations cap GPU support at two cards\u003c\/strong\u003e, because the NVMe bays and the GPU slots compete for the same PCIe lanes. Qualified cards have included the NVIDIA Tesla V100, T4, A10, A30, A40, A100, and RTX series, plus AMD MI-series; we confirm the qualified list at quote time.\u003c\/p\u003e\u003cp\u003eThe practical guidance: if the deployment wants office-deployed multi-GPU compute and SFF storage but not NVMe, this variant delivers four GPUs and sixteen SAS\/SATA bays together. If it wants both four GPUs and NVMe, the platform cannot do it; use the 8-Bay 3.5\" for four GPUs plus bulk storage, or move to a rack platform. The four-GPU-plus-NVMe combination is genuinely impossible on this platform, not merely discouraged.\u003c\/p\u003e\u003ch2\u003eManagement: iDRAC9 Generation\u003c\/h2\u003e\u003cp\u003eiDRAC9 is standard. We strongly recommend the iDRAC9 Enterprise license on any production T640: virtual console, virtual media, Lifecycle Controller firmware automation, OpenManage Enterprise group management, and SupportAssist diagnostics. The security baseline includes TPM 2.0, Silicon Root of Trust, Secure Boot, System Lockdown, and Quick Sync 2.0 mobile management. For the unattended branch and remote sites where flagship towers live, remote console is the feature that saves a truck roll.\u003c\/p\u003e\u003ch2\u003ePower and Cooling\u003c\/h2\u003e\u003cp\u003ePower profiles for the 16-Bay 2.5\" differ slightly from the 8-Bay build. NVMe drives draw less than equivalent SAS spinning drives, but the dense VM and transactional-database workloads this variant targets usually run the CPUs harder. All PSUs are hot-plug and support redundant 1+1 operation:\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003ePSU Recommendation\u003c\/th\u003e\n\u003cth\u003eEst. Peak Draw\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalanced SAS-SSD (dual Gold 6230, 384 GB RAM, 16 SAS SSDs, no GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 1100W Platinum\u003c\/td\u003e\n\u003ctd\u003e~590W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVM host (dual Gold 6248R, 768 GB RAM, 16 SAS SSDs, 1x 150W GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 1100W Platinum\u003c\/td\u003e\n\u003ctd\u003e~810W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVMe hybrid (dual Gold 6248R, 768 GB RAM, 8 NVMe + 8 SAS, 2x 300W GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 1600W Platinum\u003c\/td\u003e\n\u003ctd\u003e~1450W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum (dual Platinum 8280, 1.5 TB RAM, 16 SAS SSDs, 4x 300W GPU)\u003c\/td\u003e\n\u003ctd\u003e2x 2400W Platinum\u003c\/td\u003e\n\u003ctd\u003e~2050W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eThe 1100W pair handles most non-GPU SFF builds; 1600W suits two-GPU NVMe builds; 2400W is required for four-GPU SAS\/SATA builds. Two-GPU-or-greater builds should run on 200 to 240V AC to avoid PSU derating at low line. Cooling uses the same redundant fan envelope as the rest of the platform; four-GPU plus dual 205W CPU builds run noticeably louder than mid-range configurations.\u003c\/p\u003e\u003ch2\u003ePhysical Specs \u0026amp; Platform Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e 5U tower, rack-convertible with the optional rack conversion kit. Chassis depth roughly 726 mm. In rack mode it consumes 5U.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe expansion:\u003c\/strong\u003e up to 8 PCIe Gen3 slots plus a dedicated PERC slot with both CPUs; slots 4 through 8 require the second processor. On this variant the lane budget is shared with the NVMe backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParts availability:\u003c\/strong\u003e excellent. Shares platform, PERC family, BOSS module, iDRAC9, and PSUs with the high-volume R740 and R740xd, so spares are mature and widely stocked. Dell ProSupport on 14th gen is near end of extended support, so third-party maintenance is the standard production support path in 2026.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessories we recommend:\u003c\/strong\u003e the BOSS-S1 boot card; the rack conversion kit if rack deployment is planned (sold separately); the iDRAC9 Enterprise license; and a 25 GbE Mellanox ConnectX-4 Lx NIC for dense virtualization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlatform notes:\u003c\/strong\u003e the 16-Bay 2.5\" backplane and drive cage are not field-convertible to the 8-Bay 3.5\" LFF layout, so choose the storage profile at purchase; NVMe and four-GPU are mutually exclusive; NVMe sits outside the PERC (OS-level RAID only); BOSS is cold-swap.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOur Assessment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhere it excels:\u003c\/strong\u003e the T640 16-Bay 2.5\" is the right call when a deployment needs flagship-tier tower compute paired with SFF drive density, IOPS-leaning storage, or NVMe support. It is strong for serious branch-office virtualization (50-plus VMs with SFF tiers), tower-deployed transactional databases (SQL, Oracle, PostgreSQL with multi-TB working sets), modest VDI with NVMe boot tiers (40 to 80 desktops), tower hyperconverged nodes (Storage Spaces Direct, modest Ceph), and NVDIMM-N plus NVMe persistent-memory hybrid architectures. Optional NVMe is its clearest differentiator over the bulk-capacity 8-Bay build.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere to look instead:\u003c\/strong\u003e if bulk LFF capacity per dollar is the priority, the T640 8-Bay 3.5\" delivers more terabytes at lower IOPS. If a build needs four GPUs and NVMe at once, the platform forces a choice and a rack platform is the better answer. If the workload fits the smaller T440 envelope, the T440 16-Bay 2.5\" is cheaper and right-sized. If rack form factor is acceptable, the R740xd is better-positioned for SFF density. These are linked in the sections above and below.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBottom line:\u003c\/strong\u003e this is the 14th gen flagship tower to buy when you need SFF storage density, optionally NVMe, serious dual-socket compute, and a tower form factor. If four GPUs matter more than NVMe, the 8-Bay 3.5\" is the better build on the same platform. If SMB or remote-office budget is the constraint, the T440 16-Bay is the cheaper-and-sufficient alternative. If you have rack space, the R740xd is the stronger choice. We will make that call with you at quote time.\u003c\/p\u003e\u003ch2\u003eHonest Limitations\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVMe and four GPUs cannot coexist.\u003c\/strong\u003e Per Dell's platform spec, NVMe configurations cap GPUs at two. The PCIe lane budget cannot feed both eight NVMe drives and four full-bandwidth GPU slots. If both matter, the platform is wrong; consider rack alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVMe on PCIe Gen3 is bandwidth-limited.\u003c\/strong\u003e Roughly 3.5 GB\/s per Gen3 x4 NVMe drive, well below Gen4 (about 7 GB\/s) and Gen5 (about 14 GB\/s). For workloads that saturate NVMe sequential throughput, a 16th gen R660 or R760 with Gen5 NVMe is the better platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNVMe bypasses the PERC.\u003c\/strong\u003e No hardware RAID across NVMe on this platform; NVMe redundancy is OS-level (Storage Spaces, ZFS, mdraid). Choose the OS accordingly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage profile is fixed at purchase.\u003c\/strong\u003e The 16-Bay 2.5\" backplane and cage are not field-convertible to the 8-Bay 3.5\" LFF layout. Pick the storage profile correctly up front.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCIe Gen3 ceiling.\u003c\/strong\u003e No Gen4 or Gen5 expansion. Gen4 NICs and HBAs run at about half bandwidth; H100 and Gen5 GPUs are throttled. Match cards to a Gen3-saturating profile.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-socket loses half the platform.\u003c\/strong\u003e Single-CPU builds expose only 12 DIMMs and 3 PCIe slots; the T440 is better-positioned for single-socket needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5U footprint is large.\u003c\/strong\u003e Rack-converted it consumes 5U against the R740xd's 2U. The R740xd 24-Bay 2.5\" gives 50 percent more SFF bays in 2U; the tower wins only when tower form factor is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum build is power-intensive.\u003c\/strong\u003e Dual Platinum 8280, 1.5 TB RAM, sixteen SAS SSDs, and four 300W GPUs draws roughly 2050W and requires dual 2400W PSUs on 200 to 240V AC. Verify circuit capacity at quote time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eiDRAC9 Express is insufficient for production.\u003c\/strong\u003e Always add Enterprise, especially at unattended sites.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo direct flagship-tower successor in 15th or 16th gen.\u003c\/strong\u003e The T550 and T560 are smaller-platform (16 DIMMs, no NVDIMM-N). For 24-DIMM, 3 TB, or NVDIMM-N tower needs, the 14th gen T640 remains the answer in 2026, with the usual caveats of buying refurbished 14th gen.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWorkload Fit\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat the T640 16-Bay 2.5\" Excels At\u003c\/th\u003e\n\u003cth\u003eConsider Alternatives For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerious branch-office virtualization (50-plus VMs, SFF storage)\u003c\/td\u003e\n\u003ctd\u003eBulk LFF capacity workloads (use the 8-Bay 3.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTower-deployed transactional databases (SQL, Oracle, PostgreSQL)\u003c\/td\u003e\n\u003ctd\u003eFour GPUs and NVMe at once (platform forces a choice)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModest VDI with NVMe boot tier (40 to 80 desktops)\u003c\/td\u003e\n\u003ctd\u003eSMB\/ROBO scope (use the T440 16-Bay 2.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVMe in a tower form factor (8+8 hybrid)\u003c\/td\u003e\n\u003ctd\u003eDatacenter rack deployments (use the R740xd)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTower hyperconverged nodes (Storage Spaces Direct, ZFS, modest Ceph)\u003c\/td\u003e\n\u003ctd\u003eAll-NVMe density (24-Bay specialist or rack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNVDIMM-N plus NVMe persistent-memory hybrids\u003c\/td\u003e\n\u003ctd\u003eGen4 or Gen5 NVMe throughput (15th\/16th gen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhere to Look Instead\u003c\/h2\u003e\u003cp\u003eIf the 16-Bay 2.5\" is not the right fit, these are the configurations we point customers to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-t640-8-bay-3-5-chassis\"\u003eDell PowerEdge T640 8-Bay 3.5\" tower\u003c\/a\u003e: the same flagship platform with eight LFF bays for bulk capacity and the full four-GPU envelope. The pick when capacity per dollar and four GPUs matter more than SFF density or NVMe.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-poweredge-t440-8-bay-lff-build-your-own\"\u003eDell PowerEdge T440 8-Bay 3.5\" tower\u003c\/a\u003e and \u003ca href=\"\/products\/dell-poweredge-t340-8-bay-lff-build-your-own\"\u003eDell PowerEdge T340 8-Bay 3.5\" entry tower\u003c\/a\u003e: the 14th gen mid-tier and entry towers for SMB and remote-office deployments that fit a smaller envelope.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-poweredge-r740xd-12-bay-3-5-chassis\"\u003eDell PowerEdge R740xd 12-Bay 3.5\" rack server\u003c\/a\u003e: the same 14th gen platform in 2U with greater storage density and broader NVMe options, the better fit whenever rack space is available.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/dell-poweredge-t630-tower-8-bay-lff-chassis\"\u003eDell PowerEdge T630 8-Bay 3.5\" (13th gen flagship tower)\u003c\/a\u003e for a budget step-down, the \u003ca href=\"\/products\/dell-poweredge-t560-12-bay-3-5-chassis\"\u003eDell PowerEdge T560 12-Bay 3.5\" (16th gen tower)\u003c\/a\u003e for the current DDR5 generation, or the \u003ca href=\"\/products\/dell-poweredge-r650-8-bay-2-5-build-your-own\"\u003eDell PowerEdge R650 8-Bay 2.5\" (15th gen rack)\u003c\/a\u003e for a newer rack platform.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eReady to Configure?\u003c\/h2\u003e\u003cp\u003eTell us your workload, target memory capacity, drive count and capacity per drive (and whether SAS SSD, 10K SAS, or NVMe is the priority), single-socket or dual-socket, whether GPU acceleration is needed and how many cards, and whether NVDIMM-N persistent memory is in scope. We will turn that into a specific build and a firm quote.\u003c\/p\u003e\u003cp\u003eCall 1-800-778-1545 or submit the quote form on this page and we will respond within 24 hours. Every T640 we ship is tested with a 12+ hour burn-in and backed by a 180-day warranty, with extended 1-Year, 2-Year, and 3-Year Premium coverage available. Volume pricing applies at 5 units and above.\u003c\/p\u003e","brand":"Dell","offers":[{"title":"Default Title","offer_id":45951241879751,"sku":"B-003126","price":3915.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/4493\/0247\/files\/dell-poweredge-t640-16-bay-25-build-your-own-server-860360.jpg?v=1765539623"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/4493\/0247\/collections\/poweredge-t640-351766.jpg?v=1765540188","url":"https:\/\/wholesaleservers.com\/collections\/dell-poweredge-t640-tower-servers.oembed","provider":"Wholesale Servers","version":"1.0","type":"link"}