The Dell PowerEdge R250 4-Bay 3.5" Hot-Swap is the production-grade configuration of Dell's 15th-generation entry single-socket platform. It pairs a single Intel Xeon E-2300 (Rocket Lake) processor with four hot-plug 3.5" LFF drive bays in a 1U chassis, giving a small-business or branch-office buyer real local storage capacity and the ability to replace a failed drive without taking the server down. The hot-plug backplane is what separates this configuration from the cabled R250 chassis: on a cabled chassis a drive swap means a shutdown, while here a degraded array can be rebuilt with the server still serving its workload.

This is a 15th-gen platform, and we sell it as Surplus New or Refurbished rather than factory-new. Surplus New means a genuinely unused unit drawn from excess channel inventory: never deployed, but outside Dell's current new-sales channel, which is why it is priced below Dell-direct new. Refurbished units are previously deployed servers that we have tested and reconditioned. Both carry the Wholesale Servers warranty described below; tell us which condition you need at quote time and we will price accordingly.

To spec a build, call us at 1-800-778-1545 and a technician will walk the configuration with you: CPU, memory, drives, controller, and boot device. Every server we ship is bench-tested through a 12+ hour burn-in and backed by our 180-day warranty, and volume pricing is available once an order reaches 5 units. We quote configurations rather than selling fixed SKUs, so you get hardware sized to the workload instead of a box you have to work around.

Where the R250 Fits in the Family

The R250 sits at the bottom of Dell's 15th-generation rack lineup: one socket, Rocket Lake Xeon E-2300, unbuffered ECC memory, and a 1U enclosure built for a single workload rather than dense consolidation. Inside the R250 line there are three chassis variants. The 2-Bay Cabled is the lowest-cost option, suited to an appliance role where two drives are set once and left alone. The two 4-Bay variants double the spindle count; the difference between them is the backplane. The 4-Bay Cabled uses fixed cabling, while this 4-Bay Hot-Swap uses a hot-plug backplane.

Choose the 4-Bay Hot-Swap when the server is going into a production role and storage serviceability matters. If a drive fails in a RAID set, you pull it and insert a replacement while the array rebuilds in the background, with no maintenance window. That single capability is the reason most buyers stepping up from the 2-Bay land here. Above the R250 the single-socket ceiling is fixed at one CPU, eight cores, and four DIMM slots. When a workload needs redundant power, a third expansion slot, or rear-accessible boot media, the R350 4-Bay 3.5" is the same-generation step up. When it needs more than 128 GB of memory or more than eight cores, the platform itself is the wrong tier and the R450 4-Bay 3.5" dual-socket server is the right answer.

Storage - 4 Hot-Swap 3.5" Bays

The chassis carries four 3.5" hot-plug LFF bays on a SAS/SATA backplane. With 20 TB nearline SAS or SATA drives the raw front-bay capacity reaches roughly 80 TB; smaller, faster drives trade capacity for IOPS. There is no NVMe option on this backplane: the R250 front bays are SAS/SATA only, and NVMe is not part of the entry-tier 15th-gen storage design. If a workload needs flash, it comes from SATA or SAS SSDs in these bays, not from U.2.

For boot, the right device is the BOSS-S1 card: two M.2 SATA SSDs in a hardware RAID 1 mirror on a dedicated card. It keeps the operating system off the four front bays, so all four LFF bays stay available for data, and it provides mirrored boot redundancy without consuming a drive slot or a RAID channel. Note that the R250 uses the BOSS-S1 specifically; the rear hot-plug BOSS-S2 belongs to the R350, not this chassis. IDSDM (dual microSD) and an internal USB 3.0 port are also available for hypervisor or recovery media.

Common storage profiles at four bays: a mirrored OS pair plus a mirrored data pair on lighter builds, or, more typically here, all four bays in one protected set. RAID 10 across four drives yields two drives of usable capacity with fast rebuilds and good write behavior. RAID 5 across four drives yields three drives usable but requires the right controller, and on spinning disks the rebuild window on a 20 TB member is long enough that we steer capacity-and-resilience buyers toward RAID 10, or toward fewer, larger drives behind a mirror.

Storage Controllers

The R250 supports the entry PERC 11 controller family plus software RAID. The honest controller map for this platform:

• S150: chipset software RAID. Adequate for a boot mirror or a light, non-production array. Not a production data-array recommendation; there is no cache and parity is host-driven.
• PERC H355: hardware RAID, no cache. This is the entry hardware controller, and its limits matter. The H355 (like the H345 and H350) does RAID 0, 1, and 10 only. It does not do RAID 5, 6, 50, or 60. A buyer who needs parity RAID cannot get it from the H355.
• PERC H755: hardware RAID with battery-backed cache. This is the controller to quote when the array needs RAID 5 or RAID 6, or when write performance on a parity set matters. On the R250, parity RAID means the H755; there is no other path to RAID 5/6 on this chassis.
• HBA355i / HBA355e: pass-through HBA, internal and external, for software-defined storage or a host that wants raw disk access.

What the R250 does not take is the older PERC 9/10 line: no H730, no H740P. Those are 13th and 14th-gen Mini-PERC parts, and the 15th-gen entry board does not carry them forward. If a quote arrives asking for an H740P on an R250, that is an assumption carried over from an older platform; the correct 15th-gen equivalents are the H355 and the H755.

Processors

The R250 is a single-socket Rocket Lake platform on socket LGA 1200 with the Intel C252 chipset. It takes one Intel Xeon E-2300 processor, up to eight cores and sixteen threads, in roughly the 95W class. SKUs run from the lower-power E-2314 and E-2334 up to the 8-core E-2378 and E-2388G at the top of the stack; Pentium options exist for the lightest roles but give up cores, cache, and turbo headroom. For most buyers the 6-core E-2336 or the 8-core E-2378 is the sensible center of the range: enough threads for a file server, a domain controller, a small database, or a handful of light virtual machines, without paying for cores the workload will not use.

One platform fact worth stating plainly, because it surprises buyers: the integrated graphics on the Xeon E-2300 are disabled on Dell servers. Console video comes from the Matrox G200 in iDRAC9, not from the CPU iGPU. That has no effect on a headless server role, but it means the on-die graphics are not a usable display path here. This is Rocket Lake (Cypress Cove), the Xeon E-2300 generation. It is not Ice Lake-SP; Ice Lake-SP is the Xeon Scalable silicon in the R650 and R750, a different socket and a different platform entirely.

Memory

The R250 has four DDR4 UDIMM slots across two memory channels, two DIMMs per channel. Memory is unbuffered ECC only: no RDIMM, no LRDIMM, and no persistent memory. Maximum capacity is 128 GB using four 32 GB unbuffered ECC modules. Rated speed reaches DDR4-3200 on the Xeon E-2300 SKUs; a Pentium caps lower at 2666, and a fully populated dual-rank, two-DIMM-per-channel configuration steps to 2933 under Intel's population rules.

The 128 GB ceiling is the single most important sizing fact on this platform, and it is worth being blunt about, because older catalog copy understated it. The R250 is not a 2-slot, 64 GB machine; it is a 4-slot, 128 GB machine. Even so, 128 GB of unbuffered ECC is an entry ceiling. It is plenty for a file server, a backup target, a print or directory server, or two to four light virtual machines. It is not enough for a growing virtualization host. A buyer who can already see a path past 128 GB should not buy into this socket; the dual-socket R450 with registered DIMMs is the platform that scales.

Networking and PCIe Expansion

Onboard networking is a Broadcom 5720 dual-port 1 GbE LOM plus a dedicated iDRAC management port. There is no Network Daughter Card or OCP mezzanine on this platform and no onboard 10 GbE: the R250 networks at 1 GbE on the motherboard. If a workload needs 10 GbE or 25 GbE, that is an add-in card in one of the PCIe slots, and the slot budget is tight, so plan for it up front.

PCIe on the R250 is two PCIe Gen4 slots, both low-profile and half-length: one x8 in an x16 mechanical connector and one x8 in an x8 connector. That is the entire expansion budget. In practice the slots get spent on the RAID controller and one add-in card, such as a 10 GbE NIC or an external SAS HBA. If a build needs the controller plus a faster NIC plus anything else, the two-slot ceiling is the wall, and the same-generation R350, with a third Gen4 slot and a dedicated PERC position, is the configuration that fits.

GPU Support

The R250 is not a GPU platform, and we do not pretend otherwise. The 1U thermal envelope, the single-socket power and lane budget, and the two low-profile PCIe slots leave no practical room for a compute accelerator; there is no x16 slot at the power and cooling a datacenter GPU needs. If a buyer lands here looking for GPU compute, inference, or transcode capacity, this is the wrong box. For GPU-capable Dell hardware, look at the 2U PowerEdge R750, which has the slots, the power, and the cooling for double-width accelerators. The R250's job is single-socket general-purpose work, and it does that well; GPU work belongs on a platform built for it.

Management - iDRAC9 Generation

The R250 runs iDRAC9 with Lifecycle Controller, the same out-of-band management generation as the rest of Dell's 15th-gen line. iDRAC9 is licensed as Express, Enterprise, or Datacenter. Express covers basic remote monitoring and IPMI; for production you generally want Enterprise, which adds the full virtual console, virtual media, and the System Lockdown feature that prevents unplanned firmware and configuration drift. Datacenter adds telemetry and thermal features that matter more in dense fleets than in a single entry server.

On the security side the R250 carries Dell's silicon Root of Trust, Secure Boot, and cryptographically signed firmware, with an optional TPM 2.0 module for measured boot and compliance frameworks. For a small-business buyer, the practical value of iDRAC9 Enterprise is being able to reboot, reinstall, and recover the server remotely without a site visit, which on a branch-office box often pays for the license on the first incident.

Power and Cooling

This is where the entry positioning shows most clearly. The R250 takes a single, non-redundant power supply. Tiers run 450W Bronze, 450W Platinum, and 700W Titanium in AC and DC variants; the exact tier is confirmed per SKU at quote time, and for a single-CPU four-drive build a 450W supply is typically sufficient. What the R250 does not offer is PSU redundancy: there is no second hot-plug supply. If the workload cannot tolerate a power-supply failure taking the server offline, the R250 is not the right chassis, and the R350, with dual hot-plug redundant supplies, is the platform to quote.

Cooling is sized for the single-socket E-2300 envelope. The 95W-class processors in this platform do not require the high-performance heatsinks that the higher-TDP Xeon Scalable platforms need, and there are no exotic thermal constraints to plan around at this tier; standard data-closet and small-rack ambient conditions are well within range.

Physical Specs & Platform Notes

• Form factor: 1U rack, approximately 558.9 mm deep, regulatory model E79S. Fits standard-depth racks and most short-depth cabinets.
• PCIe expansion: two PCIe Gen4 slots, both low-profile half-length (one x8-in-x16, one x8-in-x8). Budget them for the RAID controller and one add-in card.
• Parts availability: strong. The R250 is a current 15th-gen platform; drives, power supplies, DDR4 UDIMMs, PERC 11 controllers, and BOSS-S1 cards are all readily sourced, and Dell platform support for 15th gen is active.
• Accessories we recommend: a BOSS-S1 boot card so the OS stays off the front bays; a ReadyRails sliding rail kit for the 1U chassis; and, if the workload will ever touch 10 GbE, the NIC specified at order time so the two-slot budget is planned rather than discovered.
• Platform notes: no NVMe on the front backplane; no PSU redundancy; CPU integrated graphics disabled with video via the iDRAC9 Matrox G200; BOSS-S1 rather than BOSS-S2 on this chassis.

Our Assessment

Where it excels: The R250 4-Bay Hot-Swap is the right answer for a small-business or branch-office production server that needs real local storage and serviceable drives without the cost of a dual-socket platform. File and print serving, a domain controller, a small SQL or line-of-business database, a modest backup or Veeam repository target, and two to four light virtual machines all sit comfortably inside its envelope. The hot-plug bays make it appropriate for any role where a drive failure has to be handled without scheduling downtime.

Where to look instead: If the deployment needs redundant power, a third PCIe slot, or rear-serviceable boot media, step up to the same-generation R350 4-Bay 3.5". If it needs more than 128 GB of memory, more than eight cores, or registered DIMMs, the single-socket tier is the wrong tier and the dual-socket R450 is the platform. If only two drives are ever needed and downtime for service is acceptable, the lower-cost R250 2-Bay Cabled covers the appliance case. GPU work belongs on the R750.

Bottom line: This is the production-appropriate R250. A small organization that wants a single, well-built, serviceable 1U server with four drive bays and a current management stack, and that knows it will stay inside one Xeon E-2300 and 128 GB of memory, gets exactly what it needs here at entry-tier cost. The typical buyer is an IT generalist or a managed-service provider standing up a branch or small-office server where simplicity, serviceability, and price matter more than scale.

Where the R250 Fits in 2026

The R250 is Dell's 15th-generation entry server, launched in 2021 on the Rocket Lake Xeon E-2300. As of 2026 it is one generation behind the 16th-gen entry successor, the R260 and R360 on the Xeon E-2400, which we do not currently stock; the R360 is the path forward for a buyer who specifically wants the newest entry silicon and DDR5 memory. In the other direction, the 14th-gen predecessor is the R240 4-Bay 3.5" on the Xeon E-2100 and E-2200; it is still serviceable but a generation older, with slower DDR4 and an earlier management baseline.

Unlike the older Dell 13th and 14th-gen platforms, the R250 does not yet warrant an end-of-life conversation. It is recent enough that platform support, parts, and drivers are current, which is part of why it makes sense as a Surplus New or Refurbished purchase rather than a closeout. The cross-vendor counterpart on the HPE side is the ProLiant DL20 Gen11, the equivalent entry single-socket 1U; we name it for buyers comparing vendors, though the two platforms are not interchangeable at the parts level.

Honest Limitations

• Single socket, eight cores, 128 GB. This is a hard ceiling. There is no second CPU, no path past four DIMM slots, and no registered memory. Size for it or buy a higher tier.
• No PSU redundancy. One power supply, non-redundant. A power-supply failure takes the server offline. The R350 is the redundant-power answer.
• No NVMe. The front backplane is SAS/SATA only. Flash performance comes from SAS/SATA SSDs, not U.2 NVMe.
• Two PCIe slots, both low-profile. The RAID controller plus one NIC effectively fills the chassis.
• No parity RAID on the entry controller. The H355 is RAID 0/1/10 only. RAID 5 or 6 requires the H755.
• Not a GPU platform. No accelerator path; see GPU Support above.

Workload Fit

Where to Look Instead

• Lower cost, two drives: R250 2-Bay 3.5" Cabled, the appliance-tier R250 for set-and-forget storage.
• Same four bays, fixed cabling: R250 4-Bay 3.5" Cabled, four bays without the hot-plug backplane, when downtime for drive service is acceptable.
• Same generation, more headroom: R350 4-Bay 3.5", with redundant power, a third PCIe slot, and rear hot-plug boot media.
• Up a tier for memory and cores: R450 4-Bay 3.5", dual-socket Xeon Scalable with registered memory beyond the entry ceiling.
• Previous generation: R240 4-Bay 3.5", the 14th-gen entry predecessor on the Xeon E-2100 and E-2200.

Ready to Configure?

Tell us the workload, the storage capacity and RAID level you need, the memory target, and the quantity, and we will build a configuration around it. Call 1-800-778-1545 to spec the CPU, memory, drives, controller, and BOSS-S1 boot card with a technician who knows the platform. Every R250 ships after a 12+ hour burn-in and a full inspection, carries our 180-day warranty, and is available at volume pricing from 5 units. We quote configurations rather than fixed bundles; request a quote and we will return formal pricing, typically within one business day.