The Dell PowerEdge R750xs 8-Bay 2.5" Hot-Swap is the canonical configuration of Dell's 15th gen cost-optimized 2U rack platform: eight 2.5" hot-plug bays on the Universal Backplane with native PCIe Gen4 NVMe, dual 3rd Generation Intel Xeon Scalable processors (Ice Lake-SP, socket LGA 4189, Intel C621A chipset), 16 DDR4-3200 DIMM slots, and PCIe Gen4 throughout. It is the value-tier step down from the R750 flagship: half the DIMM slots, fewer PCIe slots, a Silver and Gold tier CPU ceiling, and a smaller power envelope, priced for scale-out deployments where the full R750 envelope is more than the workload requires.

The "xs" suffix is widely misread. The R750xs is dual-socket-capable: it has two sockets that accept matching 3rd Gen Xeon Scalable processors. What "xs" signals is cost-optimized economics for workloads that often run single-socket but want the option to scale to two sockets later. It is not single-socket-only, and earlier copy (including our own) that framed it that way was wrong and is corrected here. As a 15th gen platform, the R750xs is no longer sold factory-new by Dell. Wholesale Servers stocks it refurbished and fully tested, as the cost-correct alternative to R750 flagship pricing or to stepping up to the 16th gen R760xs before the workload genuinely needs Sapphire Rapids.

To spec an R750xs build, call 1-800-778-1545 or use the quote form on this page; we respond within 24 hours. Every unit ships after a 12+ hour burn-in that exercises every memory channel, every PCIe slot, and every drive bay, and carries our standard 180-day warranty, with 1-Year, 2-Year, and 3-Year Premium options available. Volume pricing applies at 5 units and above.

The 8-Bay 2.5" SFF is the canonical R750xs configuration because the platform's defining capabilities (native front-bay PCIe Gen4 NVMe via the Universal Backplane, vSAN ESA support, and mixed-protocol storage flexibility) are SFF-only. The LFF variants are SAS/SATA only; the NVMe story lives entirely on the SFF chassis. This mirrors the SFF-canonical logic applied to the R650 and R650xs families: when the defining capability is SFF-only, the SFF variant is the reference page and the LFF variants are the capacity-specialization exceptions.

Where the R750xs Fits in the Family

The R750xs sits one tier below the R750 in Dell's 15th gen 2U lineup. Same Ice Lake generation, same 2U chassis footprint, lower envelope. Against its neighbors:

• vs. the R750 flagship: the R750 doubles the DIMM count to 32 slots, supports 40-core Platinum CPUs and Optane PMem, carries up to 8 PCIe Gen4 slots, and goes up to a 2400W PSU tier. The R750xs trades that headroom for roughly 15 to 30 percent lower cost per node. Choose the flagship only when the workload actually uses one of those flagship-only capabilities.
• vs. the R650xs (1U pair): the R650xs 8-Bay 2.5" is the same cost-optimized philosophy in a 1U chassis with a tighter 3-slot PCIe budget. For rack-density edge nodes that fit 1U, the R650xs is the pair-partner; for scale-out nodes that need 2U PCIe expansion, the R750xs is the answer.
• vs. the 14th gen R540 (predecessor): the R540 is the Cascade Lake value 2U. The R750xs adds PCIe Gen4, Universal Backplane NVMe, 8-channel memory per socket, Ice Lake per-core gains, and vSAN ESA support.
• Chassis siblings: the 8-Bay NVMe ships all bays NVMe-configured for ESA and NVMe-oF; the 16-Bay 2.5" doubles SFF density; the 8-Bay 3.5" and 12-Bay 3.5" are the LFF capacity variants.

Processors

Dual 3rd Generation Intel Xeon Scalable (Ice Lake-SP) processors on socket LGA 4189. The R750xs supports Silver and Gold tier Ice Lake SKUs up to 32 cores per socket. It does not support the top-bin Platinum 8380 (40 cores) or the other high-end Platinum SKUs; those are reserved for the R750 flagship. The 32-core-per-socket ceiling is a genuine platform validation limit, not just a thermal restriction.

Common SKU choices we see in deployment:

• Silver 4314 (16 cores, 2.4 GHz, 135W): the volume entry-tier choice. Strong per-socket core count at the lower TDP, friendly to the R750xs's smaller power envelope. Most cost-primary deployments land on the Silver 4314 or 4310.
• Silver 4316 (20 cores, 2.3 GHz, 150W): a little more core count, still inside the Silver TDP band.
• Gold 5318Y (24 cores, 2.1 GHz, 165W): the balanced-performance pick when 20 cores per socket is not enough but the Gold 6338 step is too much.
• Gold 6338N (32 cores, 2.2 GHz, 185W): the maximum-core R750xs configuration. The N suffix is network-optimized tuning. 32 cores per socket is 64 cores in a single 2U chassis at meaningfully lower acquisition cost than the equivalent R750 build.

Single-socket configurations are supported and common; it is the volume R750xs deployment pattern. Dual-socket is there when the workload scales beyond 32 cores or needs the second socket's PCIe lanes. Both sockets must carry matching CPUs; mixed-SKU dual-socket is not supported, and the second socket is not a standard field upgrade, so plan socket count at procurement.

Memory

16 DDR4 DIMM slots: 8 per CPU, one DIMM per channel, 8 memory channels per socket. This is half the DIMM count of the R750 flagship (32 slots). DDR4-3200 is supported on Gold tier and most Silver tier SKUs; lower-bin Silver may cap at 2933 MT/s. Registered ECC DIMMs only.

Maximum supported memory is 1 TB with 16 x 64 GB RDIMM, the standard production maximum for this platform. Optane PMem is not supported on the R750xs; PMem is an R750 flagship feature. The 1 DPC topology means there is no path to expand memory by adding a second DIMM per channel later; the 16 slots populated at your chosen DIMM size is the maximum, so size memory at procurement. For workloads that need more than 1 TB or Optane PMem, the R750 16-Bay 2.5" is the platform.

Storage - 8 SFF Bays with Universal Backplane

Eight 2.5" hot-swap front bays on the Universal Backplane. The Universal Backplane is the headline 15th gen storage capability and the R750xs's primary architectural advantage over the 14th gen R440/R540: native PCIe Gen4 NVMe, SAS, and SATA in the same physical bays, configured at build time.

• PCIe Gen4 NVMe (via Universal Backplane): up to 8 native front-bay NVMe drives at roughly 7 GB/s sequential read per drive. Gen4 doubles Gen3 bandwidth, which matters for write-intensive databases, vSAN ESA, NVMe-oF clients, and any sub-100 microsecond latency workload. Specify NVMe at quote time; it requires the NVMe-capable backplane SKU, and not every 8-bay shipment defaults to NVMe.
• SAS SSD mixed-use (1-3 DWPD): high-endurance dual-port SAS SSDs for database nodes and write-intensive applications where SAS reliability is preferred or NVMe latency is not required.
• SAS SSD read-intensive (0.1-1 DWPD): cost-optimized for read-dominant workloads.
• SATA SSD: the lowest-cost SSD tier for VDI master images, web application servers, and read-dominant workloads.
• Mixed NVMe and SAS: some Universal Backplane SKUs partition NVMe and SAS bays in the same chassis, giving a hot NVMe tier alongside a warm SAS tier.

BOSS-S1 is the boot path on the R750xs: a PCIe add-in card carrying two mirrored M.2 SATA SSDs in hardware RAID 1. Unlike the R650, which has a built-in chassis BOSS slot, the R750xs uses the add-in BOSS-S1 card form factor; the boot capability is identical, and all 8 front bays stay available for data when BOSS-S1 carries the OS. IDSDM and internal USB are also available for hypervisor boot.

Storage Controllers

• PERC H755 (8 GB flash-backed cache): our recommendation for production SAS/SATA storage with write workloads, and the standard R750xs hardware RAID controller. NVMe drives in the same chassis connect directly and do not pass through the H755.
• PERC H745 (4 GB flash-backed cache): the mid-tier choice for read-dominant SAS/SATA workloads.
• PERC H355 / H345: entry-tier RAID for cost-sensitive builds. These are RAID 0, 1, and 10 only. They do not do RAID 5 or RAID 6; for parity RAID, the H755 or H745 is required.
• HBA355i (pass-through): required for vSAN ESA, Ceph, ZFS, and software-defined storage. Presents drives directly to the OS with no RAID controller in the data path.
• S150 software RAID: chipset-level software RAID, for very entry-tier configurations only.

Processors and Memory Footnote

Both sockets share the 8-channel Ice Lake memory topology described above; a single-socket build populates only 8 of the 16 DIMM slots and halves both memory bandwidth and capacity. If a single-socket node is likely to grow, populate it with that future second socket's memory plan in mind.

Networking and PCIe Expansion

The R750xs uses OCP NIC 3.0, the 15th gen networking shift away from the rNDC mezzanine of the 13th and 14th gen platforms. One OCP 3.0 slot plus the PCIe Gen4 expansion slots. For production 2U deployments 25 GbE is the standard recommendation; even the R750xs's lower compute envelope can saturate 10 GbE under concurrent storage and application load.

• Dual-port 25 GbE SFP28 (OCP 3.0): standard for production R750xs deployments. Broadcom BCM57414 and NVIDIA ConnectX-5 variants both qualified.
• Dual-port 100 GbE QSFP28: for NVMe-heavy or storage-serving configurations where aggregate throughput justifies 100 GbE.
• Dual or quad-port 10 GbE SFP+: legacy compatibility and VLAN segmentation.
• Quad-port 1 GbE RJ45: management and lower-bandwidth deployments.

PCIe expansion is up to 6 slots: 5 PCIe Gen4 plus 1 PCIe Gen3, all low-profile, per Dell's R750xs technical guide. That is fewer than the R750 flagship's up to 8 Gen4 slots and reflects the value-tier positioning. The 6-slot budget covers most R750xs profiles: a dual-port 25 GbE OCP, a dedicated HBA, an optional GPU, and a spare. SNAP I/O support lets some adapters run low-profile without consuming an additional connector, useful for high-port-density network builds.

GPU Support

The R750xs is not a GPU-compute platform, and it is worth being plain about that before a buyer specs one for the wrong job. The 2U chassis and the value-tier power and PCIe budget support up to two single-width 75W accelerators (NVIDIA T4, A2, or L4) for light inference, VDI acceleration, or transcode. There is no headroom for double-width 300W+ training GPUs. For serious GPU compute, the R750 or the purpose-built R750xa is the right platform; the R750xa carries the multi-GPU thermal and power design the xs intentionally omits to hit its price point.

Management - iDRAC9 Generation

iDRAC9 Enterprise is the production recommendation. This is the enhanced 15th gen iDRAC9 shared with the R650 and R750: improved NVMe monitoring at Gen4 speeds, Active Health System, Secured Component Verification, iDRAC Direct via front-panel micro-USB, and Quick Sync 2.0. A hardware Silicon Root of Trust validates firmware at boot, with Secure Boot, signed firmware updates, and System Lockdown on the Enterprise and Datacenter tiers. TPM 2.0 is standard, and the Lifecycle Controller handles agent-free deployment and firmware management.

Power and Cooling

The R750xs supports a wider low-end PSU range than the R750 flagship, reflecting its lower draw. Available tiers are 600W, 800W, 1100W, and 1400W Platinum or Titanium. The 600W option is R750xs-specific; the R750 flagship does not offer it, and the flagship's 2400W tier is not available here.

Both PSUs must match; mixed wattages are not supported. Standard fans cover all R750xs CPU and storage combinations, since the 32-core TDP ceiling stays below the threshold where high-performance fans become necessary.

Physical Specs and Platform Notes

• Form factor: 2U rack, standard 19-inch mount, chassis depth roughly 28 inches. Same external dimensions as the R750; verify rack depth at quote time.
• PCIe expansion: up to 6 slots (5 Gen4 plus 1 Gen3), all low-profile. Plan placement so Gen4 NICs and HBAs avoid the single Gen3 slot.
• Parts availability: strong. The 15th gen platform is well inside active Dell ProSupport coverage, and parts supply for CPUs, DIMMs, PERC controllers, PSUs, and drives is excellent.
• Accessories we recommend: the B21 2U sliding rail kit (shared across R550 / R750xs / R760), an optional security bezel with LCD, and the BOSS-S1 boot card to keep the OS off the front bays.
• Platform notes: the two PSU bays sit adjacent on the R750xs rather than spread apart as on the R750, a serviceability and airflow difference rather than a functional one. The BOSS-S1 add-in card consumes one PCIe slot, so account for it in the slot budget. The second CPU socket is not a standard field upgrade.

Our Assessment

Where it excels: the R750xs 8-Bay 2.5" is the right call when you need 15th gen platform currency (Ice Lake, PCIe Gen4, Universal Backplane NVMe, vSAN ESA capability) in a 2U dual-socket-capable chassis at meaningfully lower cost than the R750 flagship. Scale-out virtualization clusters, software-defined storage nodes, mid-density application servers, and VDI deployments where 32 cores per socket and 1 TB of memory cover the requirement are the canonical use cases. The per-node saving over the R750 is real, typically 15 to 30 percent, and it compounds at cluster sizes of 10 or more nodes.

Where to look instead: workloads that genuinely need 40-core Platinum CPUs, more than 1 TB of memory, Optane PMem, more than 6 PCIe slots, or serious GPU compute belong on the R750 flagship. If the design driver is maximum NVMe density per node, the R750 24-Bay goes to 24 Gen4 NVMe. If you want the same economics in 1U, the R650xs is the pair-partner.

Bottom line: this is the 15th gen 2U scale-out workhorse for the buyer who wants current-generation storage architecture and Ice Lake compute without paying flagship pricing. It is the default R750xs configuration; step up to the R750 only when the deployment has a specific reason the value-tier envelope cannot cover, and step out to the LFF or higher-density SFF siblings only when the bay profile changes.

Where the R750xs Fits in 2026

The R750xs launched in 2021 on the Ice Lake-SP platform and remains a current-architecture 2U server. Its successor, the 16th gen R760xs (Sapphire Rapids and Emerald Rapids, DDR5, PCIe Gen5), is shipping, but most R750xs-class workloads do not yet saturate DDR4-3200 or PCIe Gen4, which is what makes a tested refurbished R750xs the cost-correct buy for scale-out and value-tier 2U deployments in 2026. Against the 14th gen R440/R540 it replaces, the R750xs is a genuine generational step up in memory channels, PCIe generation, and storage architecture. The platform earns its place when you want 15th gen currency and Universal Backplane flexibility on infrastructure planned through the late 2020s, and when per-node cost is a design metric rather than an afterthought.

Honest Limitations

• Half the DIMM count of the R750. 16 slots versus 32 means a 1 TB RDIMM ceiling, no 2 DPC path, and constrained expansion. Plan memory at procurement; you cannot scale it up later in the same chassis.
• No Optane PMem. PMem 200-series is a flagship feature. PMem workloads belong on the R750.
• CPU ceiling at 32 cores per socket. The Platinum 8380 and other top-bin Platinums are not supported. High-end compute-bound workloads belong on the R750.
• BOSS-S1 is an add-in card, not a chassis slot. Functionally identical to the R650's built-in BOSS, but it consumes a PCIe slot; account for it in the slot budget.
• Reduced PCIe slot count. 6 slots (5 Gen4 plus 1 Gen3) versus 8 on the R750. A build with a dedicated HBA plus 100 GbE plus a GPU plus NVMe expansion can run the slot budget tight.
• One Gen3 slot in the count. Per Dell's tech guide, one of the six slots is Gen3, not Gen4. Place Gen4 NICs and HBAs accordingly.
• Limited GPU support. Up to two single-width 75W cards. Not a GPU-compute platform.
• Second socket is not a field upgrade. Single-socket Ice Lake is supported and common, but adding the second CPU later is not a standard service. Decide socket count at procurement.

Workload Fit

Where to Look Instead

• Need all bays NVMe out of the box? The R750xs 8-Bay NVMe ships ESA-ready with every bay NVMe-configured.
• Need more SFF density? The R750xs 16-Bay 2.5" doubles the bay count on the same platform.
• Need LFF capacity drives? The R750xs 8-Bay 3.5" and 12-Bay 3.5" are the NL-SAS capacity variants.
• Need the flagship envelope? The R750 16-Bay 2.5" brings 32 DIMM slots, Platinum CPUs, and Optane.
• Cost-primary at 14th gen? The R540 12-Bay 3.5" is the lower-cost Cascade Lake predecessor.
• HPE shop? The closest HPE counterpart at this tier is the ProLiant DL380 Gen11 (2U dual-socket); we quote it on request.

Ready to Configure?

Tell us your workload, single or dual-socket target, NVMe versus SAS/SATA preference, vSAN architecture if applicable, memory target, network speed requirement, and quantity. We respond within 24 hours and will quote the R750 flagship alongside it where the envelope comparison is relevant. Volume pricing applies at 5 units and above.

Every Wholesale Servers R750xs ships after a 12+ hour burn-in test covering every PCIe slot, every memory channel, and every drive bay. Standard 180-day warranty included, with 1-Year, 2-Year, and 3-Year Premium warranty options available. Call 1-800-778-1545 or use the quote form on this page to start a configuration.