The Dell PowerEdge R550 8-Bay 2.5" is the compute-primary SFF configuration of Dell's 15th gen value-tier 2U platform: eight 2.5" 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 R550 variant for workloads where dual-socket Ice Lake compute is the primary requirement and local storage is a supporting role rather than the center of gravity.

This page documents the R550 platform in full with the compute-primary SFF profile as the variant-specific framing; the two companion variants, the R550 8-Bay 3.5" LFF (bulk capacity) and the R550 16-Bay 2.5" SFF (maximum density), share the same board, memory topology, PCIe budget, and management. 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.

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 SFF Bays Is the Right Choice

The 8-Bay 2.5" SFF is the compute-primary variant of the R550 family. Its front bays take 2.5" drives only (SAS SSD, SAS HDD typically 1.2 TB to 2.4 TB, SATA SSD), not 3.5" LFF nearline drives, so it is the right pick when storage is IOPS-oriented and modest in footprint rather than capacity-bound. It runs at half the density of the 16-Bay, which keeps acquisition cost and airflow load down: if a workload genuinely needs eight SFF bays and no more, paying for the 16-Bay backplane is paying for capability it will not use.

Of the three R550 chassis this one carries the lowest acquisition cost, which makes it the most economical entry to dual-socket Ice Lake when the workload is CPU-and-memory-primary. Application servers on shared SAN storage, Kubernetes workers with persistent volumes on external storage, database hosts whose data files live on SAN or NFS, and virtualization hosts running VMs on shared datastores are the natural patterns. When storage is the headline rather than the supporting cast, the LFF variant (bulk capacity) or the 16-Bay (SFF density) earns its premium.

Storage - 8 SFF Bays

Eight 2.5" SAS/SATA hot-swap bays. 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, the R750xs NVMe variant, or the R750.

Practical raw capacity at 8 SFF bays:

• 8x 2.4 TB 10K SAS HDD: 19.2 TB raw. RAID 10 gives 9.6 TB usable for general application data; RAID 6 gives 12 TB usable for read-heavy work at higher resilience.
• 8x 3.84 TB SAS SSD: 30.72 TB raw. RAID 10 gives 15.36 TB usable for write-intensive application or database tiers; RAID 6 gives about 23 TB.
• 8x 7.68 TB SAS SSD: 61.44 TB raw, the current SFF SAS SSD ceiling we stock. RAID 6 yields about 46 TB usable.
• Mixed: 2x SAS SSD (RAID 1 for OS or hot data) plus 6x 10K SAS HDD (RAID 6 capacity tier) is a common cost-optimized application-server build.

Boot stays off the front bays. BOSS-S2 carries two mirrored M.2 SATA SSDs in hardware RAID 1 on a dedicated card, leaving all eight front bays 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 2.5":

• 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, and the one to specify for parity RAID. 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.
• 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; specify the H755 or H745 instead if the design needs parity RAID.
• 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. Typical R550 SKUs run from the Xeon Silver 4314 (16 cores, 135W), the standard value-tier build, through the Gold 6326 (16 cores, 2.9 GHz, 185W) for frequency-sensitive licensing-bound workloads, up to the Gold 6342 (24 cores, 230W) at the R550 ceiling, where you should verify 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 (which is common for the compute-primary roles this chassis suits), the single-socket R750xs 8-Bay 2.5" is the better-matched and lower-power chassis. Where the workload needs more than 24 cores per socket, that is the signal to step up to the R650 or R750.

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 workloads whose memory footprint exceeds 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 modern virtualization fabrics and 25 GbE leaf switches.
• 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, the common attach for the database-on-SAN pattern this chassis suits.

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, 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. The half-populated SFF backplane on this variant keeps airflow load light, so thermal headroom is comfortable.

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, 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 front bays.
• Platform notes: SAS/SATA front bays only (no NVMe backplane), RDIMM-only memory (no LRDIMM or Optane), and OCP NIC 3.0 networking are the three chassis facts buyers most often confirm before committing a design.

Our Assessment

Where it excels: The lowest-acquisition-cost path to dual-socket Ice Lake at 15th gen when local storage is a supporting role. Application servers running on shared SAN or NFS with local OS and scratch on SAS SSD, mid-tier databases with data files on Fibre Channel or iSCSI and the transaction log on local RAID 10 SSD, Kubernetes workers with persistent volumes on external CSI storage, virtualization hosts on shared datastores, and branch-office multi-role hosts running directory, file, and a few application VMs. The economics work whenever the workload is CPU-and-memory-primary and the storage footprint stays modest.

Where to look instead: If a single Ice Lake socket covers the compute, the R750xs 8-Bay 2.5" gives the same eight SFF bays at lower cost and power, and many of these compute-primary roles fit on one socket. If storage is the headline, the R550 16-Bay 2.5" adds SFF density and the R550 8-Bay 3.5" adds bulk LFF capacity on the same platform. If the design needs front-bay NVMe, the R650 or R750 carry NVMe backplanes. If memory exceeds 1 TB, the R650 or R750 with their 32-slot topology are the answer.

Bottom line: For a compute-primary SAS/SATA workload at 1 TB of memory or less and 24 cores per socket or fewer, where local storage is modest and often offloaded to a SAN, the R550 8-Bay 2.5" is the cost-correct 15th gen chassis. If the workload genuinely uses dual-socket thread count, this is the right box; if it does not, we will put the single-socket R750xs next to it at quote time and compare on total cost of ownership rather than acquisition price alone.

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, and the stronger 15th gen iDRAC9 security baseline. The R550 earns its place for compute-primary SAS/SATA workloads up to 1 TB memory and 24 cores per socket that want dual-socket Ice Lake in a current-generation value chassis without paying for capability the deployment will not use.

Honest Limitations

• No front-bay NVMe at any drive count. SAS/SATA backplane only.
• 16 DIMM slots and a 1 TB memory ceiling. No LRDIMM, no Optane PMem.
• Value-tier CPU range, up to 24 cores per socket; higher-core and higher-TDP Ice Lake SKUs are an R650 or R750 capability.
• Eight SFF bays only. Storage-primary designs want the 16-Bay 2.5" for density or the 8-Bay 3.5" for bulk LFF capacity.
• 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

• Single-socket workload: the R750xs 8-Bay 2.5" gives the same eight SFF bays with one Ice Lake socket at lower cost and power, the most common alternative for these compute-primary roles.
• More memory, NVMe, or PCIe slots: the R650 8-Bay 2.5" is the mainstream 1U step up, and the R750 is the 2U equivalent with NVMe and a 32-slot memory topology.
• Storage-primary on the same platform: the R550 16-Bay 2.5" for SFF density or the R550 8-Bay 3.5" for bulk LFF capacity.
• Previous generation, budget-led: the Dell PowerEdge R540 is the 14th gen value-tier 2U 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 target, your CPU preference (or a workload description so we can recommend a SKU), your storage profile (OS-only, RAID 10 SSD, or a mixed tier), 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 workload sizing suggests a single Ice Lake socket is sufficient, we will quote the R750xs 8-Bay 2.5" alongside the R550 for comparison; total cost of ownership often favors the single-socket option for compute-primary deployments at this storage tier.