The Dell PowerEdge R550 8-Bay 3.5" is the large-form-factor configuration of Dell's 15th gen value-tier 2U platform: eight 3.5" SAS/SATA hot-plug bays, two 3rd Generation Intel Xeon Scalable processors (Ice Lake-SP, socket LGA 4189), sixteen DDR4-3200 RDIMM slots, and PCIe Gen4 throughout. It is the bulk-capacity variant of the R550 family, built for workloads that pair dual-socket Ice Lake compute with high-capacity nearline SAS storage in a single 2U chassis, without the memory ceiling, NVMe backplane, or PCIe budget of the flagship R750.

The R550 ships either Refurbished (tested, reconditioned, previously deployed) or Surplus New, which is genuinely unused excess inventory that never entered a production deployment and sits outside Dell's normal new-sales channel; both carry the same Wholesale Servers burn-in and warranty. The R550 platform fundamentals (Ice Lake silicon, the 16-DIMM memory topology, PCIe Gen4, OCP NIC 3.0 networking, BOSS boot) are shared across all three R550 variants; this page documents them in full with the LFF storage profile as the variant-specific framing.

To configure a build, call 1-800-778-1545 or use the quote form on this page. Every Wholesale Servers R550 ships after a 12+ hour burn-in and carries a 180-day warranty, and volume pricing applies at 5 units and above.

When 8 LFF Bays Is the Right Choice

Within the R550 family there are three chassis on one shared platform: this 8-Bay 3.5" LFF (bulk nearline capacity), the R550 8-Bay 2.5" SFF (compute-primary, IOPS-oriented storage), and the R550 16-Bay 2.5" SFF (maximum SFF spindle density). All three share the same system board, the same 16 DIMM slots, the same PCIe and PSU options, and the same iDRAC9 Enterprise management. The chassis decision is purely about front-bay storage profile.

The 8-Bay 3.5" is the right pick when raw capacity per chassis matters more than spindle count or IOPS. Eight LFF bays at 24 TB nearline SAS is 192 TB raw in 2U, a capacity profile the SFF variants cannot reach. The natural fits are file servers and NAS heads where the file workload also needs dual-socket compute, backup target hosts that run media-server or deduplication work alongside the capacity, branch-office consolidated hosts running virtualization on top of local LFF storage, and Ceph or ZFS capacity nodes co-located with application workloads. For IOPS-dense roles the SFF variants are the better profile; for capacity beyond eight LFF bays the step is the R750 12-Bay LFF.

Storage - 8 LFF Bays

Eight front-accessible 3.5" LFF hot-plug bays, all SAS or SATA. The R550 backplane is SAS/SATA only; there is no NVMe front-bay option on the R550 at any drive count. This is a chassis-level limit, not a configuration choice. Workloads needing front-bay NVMe belong on the R650, R750xs, or R750. The R550 8-Bay 3.5" is the bulk-capacity LFF chassis in the 15th gen value slot.

Practical raw capacity at 8 LFF bays:

• 8x 20 TB nearline SAS HDD: 160 TB raw. RAID 6 strongly recommended at this per-drive capacity, roughly 120 TB usable with two parity drives.
• 8x 24 TB nearline SAS HDD: 192 TB raw, about 144 TB usable RAID 6. The current LFF NL-SAS ceiling we stock.
• 8x 8 TB SAS SSD: 64 TB raw. RAID 10 gives 32 TB usable (4 mirror pairs) for high-write-throughput data; RAID 6 gives about 48 TB usable for balanced read and write.
• Tiered mix: 2x SAS SSD as a hot tier plus 6x nearline SAS for capacity, paired with a software tiering layer (Storage Spaces, ZFS, Ceph cache tiers), is a common converged configuration.

Boot stays off the front bays. BOSS-S2 carries two mirrored M.2 SATA SSDs in hardware RAID 1 on a dedicated card, keeping the operating system off the eight LFF bays and leaving all of them for data. The 15th gen BOSS-S2 uses M.2 SATA modules; the NVMe-based BOSS-N1 is a 16th gen part and is not used here. IDSDM (internal dual microSD) and an internal USB 3.0 port are also available for hypervisor boot.

Storage Controllers

The R550 uses the Dell PERC 11 controller family. Production options for the 8-Bay 3.5":

• PERC H755. 12 Gbps SAS-3, 8 GB flash-backed write cache, full RAID 0/1/5/6/10/50/60. The standard production hardware-RAID controller for the 8-Bay 3.5" and the one to specify for parity RAID on bulk NL-SAS. Wholesale Servers ships hardware-RAID R550 builds with the H755 unless you specify otherwise.
• PERC H745. Lower-cache hardware-RAID alternative to the H755, also RAID 5 and RAID 6 capable. Quoted when the H755 cache budget is not needed.
• HBA355i. SAS-3 pass-through, no hardware RAID. The correct controller for Ceph, ZFS, and Storage Spaces Direct, where the software layer owns redundancy.
• PERC H355 and H345. Entry hardware RAID, RAID 0/1/10 only, no RAID 5 or 6. Appropriate for mirrored SAS SSD application data. Do not specify an H355 for a parity-RAID NL-SAS design; that is the most common controller mistake on this platform, and the H755 or H745 is the right answer.
• PERC S150. Chipset software RAID, for dev, test, and light boot duty only, never production data.

Processors

Two 3rd Generation Intel Xeon Scalable processors (Ice Lake-SP, socket LGA 4189) on the Intel C621A chipset. The R550 is the value cut of the platform, and Dell caps its qualified SKU list at 24 cores per socket; the 32-core and 40-core Platinum SKUs are an R650 or R750 capability. This is the same value-tier discipline as the R540 versus R740 on 14th gen: Dell qualifies a subset of the SKU stack per chassis tier rather than offering the full range everywhere.

Recommended R550 CPU configurations:

• Xeon Silver 4314 (16 cores, 2.4 GHz, 135W). The standard value-tier build, 32 cores and 64 threads dual-socket. Strong general-purpose virtualization and application-server fit, comfortably inside the thermal envelope.
• Xeon Silver 4316 (20 cores, 2.3 GHz, 150W). More core density at a modest power increase, for VM-density-driven sizing.
• Xeon Gold 6326 (16 cores, 2.9 GHz, 185W). Higher per-core frequency for licensing-bound workloads (SQL Server Standard, Oracle, per-core ISV licensing), with stronger single-thread performance.
• Xeon Gold 6342 (24 cores, 2.8 GHz, 230W). The R550 ceiling, 48 cores and 96 threads dual-socket. Supportable in the R550 but it narrows ASHRAE class margin, so verify against the thermal envelope at quote time.

Running a single CPU is the most common configuration mistake on a dual-socket Ice Lake board: the R550's memory channels and part of the PCIe lane budget are split across both sockets, so a one-CPU build strands half the DIMM slots and some riser capacity. If a single socket genuinely covers the workload, the single-socket R750xs is the better-matched and lower-power chassis. Ice Lake also brings eight memory channels per socket (versus Cascade Lake's six), native PCIe Gen4, and the Sunny Cove IPC uplift, so even at equal core counts the platform is a real step over 14th gen for memory-bandwidth-bound work.

Memory

Sixteen DDR4 DIMM slots, eight channels per CPU at one DIMM per channel. The R550 takes registered ECC RDIMM only. It does not support LRDIMM, and it does not support Intel Optane persistent memory. Maximum capacity is 1 TB with 16x 64 GB dual-rank RDIMM. Rated speed is DDR4-3200 at one DIMM per channel; value-tier CPU SKUs frequently run the bus at 2933, so size memory expecting 2933 to 3200 depending on the processor chosen.

Common configurations: 128 GB (8x 16 GB, one DIMM per channel on each socket), 256 GB (16x 16 GB fully populated, the most common refurbished R550 build), 512 GB (16x 32 GB), and 1 TB (16x 64 GB) at the ceiling. The 1 TB cap, and the absence of LRDIMM and Optane, is the cleanest line between the R550 and the mainstream R650 and R750 with their 32 DIMM slots and 4 TB topology. For high-density virtualization, large in-memory databases (SAP HANA, large Redis or Spark working sets), or VDI consolidation that drives memory above 1 TB, the R750 is the correct platform, and we will say so at quote time if your sizing pushes against the ceiling.

Networking and PCIe Expansion

Networking on the R550 is OCP NIC 3.0, the 15th gen standard. This is the part of the platform most often described wrong in secondhand listings: the 13th and 14th gen rNDC mezzanine is gone, replaced by the OCP 3.0 slot, which does not consume a standard PCIe slot. The R550 ships with a 1 GbE management LOM for iDRAC; production networking is added through the OCP 3.0 card or a PCIe NIC. Common attaches:

• 2x 10 GbE SFP+ (Intel X710 or equivalent), the standard production uplink.
• 2x 25 GbE SFP28 (Mellanox ConnectX-5 or Intel E810) for software-defined storage backplanes and 25 GbE leaf fabrics.
• 4x 10 GbE Base-T (Intel X710-T4) for copper 10 GbE without SFP+ optics.
• 2x 32G Fibre Channel (Emulex or QLogic, PCIe Gen4) for SAN-attached block storage.

PCIe expansion is Gen4, up to roughly five slots depending on riser configuration (the value-tier riser layout is narrower than the R750's), plus a dedicated slot for the PERC controller. Gen4 doubles per-lane bandwidth over Gen3, so 25 and 100 GbE NICs and 32G FC HBAs run without slot-level saturation. For designs that need more than that slot budget (multiple HBAs plus high-speed NICs plus accelerators), the R750's eight-slot layout is the correct platform.

GPU Support

The R550 is not a GPU platform. It is a value-tier storage-and-compute chassis: the PCIe budget, power delivery, and thermal envelope are not built for double-width accelerators, and we do not quote it for GPU compute. If the deployment needs GPUs (AI and ML inference or training, accelerated VDI, rendering), the Dell answers at this generation are the R650 for low-profile single-width cards or the R750 and R750xa for double-width work. GPUs specified on an R550 are a configuration we redirect at quote time.

Management - iDRAC9

The R550 ships with iDRAC9 (15th gen) and Lifecycle Controller. Wholesale Servers builds include iDRAC9 Enterprise unless you specify otherwise: Enterprise adds virtual console redirection, virtual media, and full SNMP and Redfish API access, which is non-negotiable for remote-site or branch hosts where OS-level recovery has to happen without on-site staff. The 15th gen security stack is present: Silicon Root of Trust, Secure Boot with system-level signing of BIOS updates, TPM 2.0 standard, and System Lockdown (requires Enterprise). iDRAC9 integrates with OpenManage Enterprise for fleet management, Ansible for infrastructure-as-code workflows, and Redfish-native monitoring. iDRAC9 is the 15th gen management generation; iDRAC10 is a later part and does not apply to the R550.

Power and Cooling

The R550 supports up to two redundant hot-plug power supplies in a 1+1 configuration, from the shared 15th gen PSU line:

The R550 does not offer the 1400W or 2400W PSUs available on the R750, consistent with its value-tier envelope. Cooling is standard front-to-rear air with up to five cold-swap fans; there is no liquid-cooling option. ASHRAE A2 (10 to 35 C) is fully supported across all configurations; A3 (to 40 C) and A4 (to 45 C) are supported with CPU TDP held at 150W or below and higher-power add-in cards restricted. Most production deployments target A2.

Physical Specs & Platform Notes

• Form factor: 2U rack, regulatory model E75S. Standard-depth 2U chassis; budget rack depth for rear cable management.
• PCIe expansion: PCIe Gen4, up to about five slots by riser configuration, plus a dedicated PERC slot; full-height and low-profile positions depend on the riser chosen.
• Parts availability: Strong. 15th gen Ice Lake is current enough that PERC 11 controllers, OCP 3.0 NICs, DDR4-3200 RDIMM, BOSS-S2 modules, LFF drive carriers, and PSUs are all readily sourced, and Dell support paths remain active.
• Accessories we recommend: the R550 / R750xs / R760 B21 2U sliding rail kit for the rack mount, an OCP 3.0 NIC sized to the uplink, and a BOSS-S2 card so boot stays off the eight LFF bays.
• Platform notes: SAS/SATA LFF front bays only (no NVMe backplane), RDIMM-only memory (no LRDIMM or Optane), OCP NIC 3.0 networking, and air cooling only are the chassis facts buyers most often confirm before committing a design.

Our Assessment

Where it excels: Converged dual-socket compute plus bulk LFF capacity in 2U at 15th gen value-tier pricing. File servers and NAS heads that also need application compute, backup targets running media-server or dedupe workloads, branch-office consolidated hosts combining virtualization with local storage, Ceph or ZFS capacity nodes co-located with application workloads, and mid-tier databases at the LFF capacity tier. Eight LFF bays at up to 192 TB raw is a capacity-per-dollar profile the SFF variants and most refurbished 2U platforms cannot match.

Where to look instead: If memory needs to exceed 1 TB or use Optane, step to the R750 with its 32 DIMM slots. If the storage architecture needs front-bay NVMe, the R650 or R750 carry NVMe backplanes; the R550 does not. If a single Ice Lake socket covers the compute, the R750xs 8-Bay 3.5" gives the same LFF profile at lower cost and power. If more than eight LFF bays are needed, the R750 12-Bay 3.5" is the step up.

Bottom line: For a SAS/SATA workload at 1 TB of memory or less, 24 cores per socket or fewer, and a genuine need for bulk LFF capacity alongside dual-socket compute, the R550 8-Bay 3.5" is the cost-correct 15th gen chassis and the one we steer converged file-and-application buyers toward. When a design breaches the memory, core, or NVMe ceiling, we move the quote to the R650 or R750 and explain why. The procurement-justification summary: value-tier 2U, dual Ice Lake, eight 3.5" SAS/SATA bays to 192 TB raw, current-generation support, refurbished or surplus-new pricing.

Where the R550 Fits in 2026

The R550 is current-generation-adjacent hardware. 15th gen Ice Lake-SP launched in 2021 and remains under active Dell support, with the 16th gen R660 and R760 (Sapphire Rapids and Emerald Rapids) now above it. For a value-tier 2U buyer that means two things: this is not end-of-life hardware, so a refurbished or surplus-new R550 has real production life ahead of it; and because 16th gen is shipping, 15th gen value-tier pricing on the secondary market is attractive relative to the capability you get.

Against 14th gen, the R550 replaces the R540 (Skylake and Cascade Lake). The deltas are 3rd Gen Ice Lake-SP versus 2nd Gen Cascade Lake, eight memory channels per socket versus six, PCIe Gen4 versus Gen3, DDR4-3200 versus DDR4-2933, and the stronger 15th gen iDRAC9 security baseline. The R540's 12-bay LFF maximum was higher than the R550's eight LFF bays, so if the requirement exceeds eight LFF bays the R540 12-Bay or the R750 12-Bay LFF is the right platform. The R550 earns its place for SAS/SATA workloads up to 1 TB memory and 24 cores per socket that need bulk LFF density in a current-generation value chassis.

Honest Limitations

• No front-bay NVMe at any drive count. SAS/SATA LFF backplane only. This is the hard limit that most often disqualifies the chassis.
• 16 DIMM slots and a 1 TB memory ceiling. No LRDIMM, no Optane PMem. Memory-bound workloads above 1 TB belong on the R650 or R750.
• Value-tier CPU range, up to 24 cores per socket; the higher-core and higher-TDP Ice Lake SKUs are an R650 or R750 capability.
• Eight LFF bays only. Bulk-capacity designs above eight LFF spindles need the R750 12-Bay LFF.
• Roughly five Gen4 PCIe slots by riser, not the R750's eight. Not a GPU platform, and air cooling only.

Workload Fit

Where to Look Instead

• More memory, NVMe, or PCIe slots: the R750 (2U, 32 DIMM slots, NVMe backplane, eight PCIe slots) is the mainstream step up, and the R650 is the 1U equivalent.
• Single-socket LFF workload: the R750xs 8-Bay 3.5" matches this LFF profile with one Ice Lake socket at lower cost and power.
• More than eight LFF bays: the R750 12-Bay 3.5" for bulk capacity beyond this chassis.
• Previous generation, budget-led: the Dell PowerEdge R540 12-Bay 3.5" is the 14th gen value-tier 2U LFF predecessor (Skylake and Cascade Lake, rNDC networking) at a lower price point where 15th gen features are not required.
• HPE equivalent: the closest HPE counterpart at this tier is the ProLiant DL380 Gen11 in its value configuration; we name it for cross-shopping but do not currently stock it.

Ready to Configure?

Tell us your workload, your memory and storage targets, your CPU preference (or a workload description so we can recommend a SKU), your storage architecture (hardware RAID on a PERC H755 versus pass-through on an HBA355i for software-defined storage), your drive mix (nearline SAS capacity, SAS SSD, or a tiered combination), your network uplink (10, 25, or 100 GbE on the OCP card), and quantity. Volume pricing applies at 5 units and above, and we respond within 24 hours. Every Wholesale Servers Dell PowerEdge R550 ships after a 12+ hour burn-in across every PCIe slot, memory channel, and drive bay, with a 180-day warranty included and 1-Year, 2-Year, and 3-Year options available. Call 1-800-778-1545 or use the quote form on this page.

If your memory or storage requirements push against the R550 ceiling, we will quote the R750 alongside; for borderline sizings the modest premium for the R750 is frequently the better long-term call, and we will say so directly. If a single Ice Lake socket covers your compute, we will put the R750xs 8-Bay 3.5" next to it so you can compare on total cost of ownership rather than acquisition price alone.