The R440 10-Bay 2.5" NVMe is the hybrid-NVMe configuration of the R440 family - ten hot-swap 2.5" front bays where up to 4 of them can be NVMe SSDs, with the remaining 6 bays for SAS/SATA drives. This is the right R440 variant when the workload has a hot tier that benefits from NVMe latency (database log volumes, transaction journals, cache tiers, write-ahead logs) and a separate capacity tier that fits on SAS/SATA bulk storage. The compute platform is identical to the rest of the R440 family; the differences live in the NVMe-capable backplane that routes 4 of the 10 bays through PCIe lanes to the CPU complex.

This is a companion to the canonical R440 4-Bay 3.5". It shares the full R440 platform: 1st or 2nd Gen Intel Xeon Scalable on LGA 3647, 16 DDR4 DIMM slots with the asymmetric topology, the same PERC controller lineup for the SAS/SATA bays, the same NDC networking options, and the same value-tier PSU pair. The NVMe-capable backplane adds PCIe routing to 4 of the 10 bays at the cost of PCIe slot budget for other expansion.

To configure a build, call 1-800-778-1545 or use the quote form below. Every refurbished unit ships under our 180-day warranty with 12+ hour burn-in testing, and volume pricing starts at 5 units.

Critical Buyer-Expectation Calibration

Despite the SKU name, this is NOT a 10-NVMe chassis. The R440 platform PCIe lane budget supports a maximum of 4 NVMe drives in the 10-bay configuration. The other 6 bays are SAS/SATA only. If your workload requires more than 4 NVMe drives in a single chassis, R440 is not the right platform - R640 supports up to 10 NVMe in flex-zoning configurations, R740xd 24-Bay NVMe supports up to 24 dedicated NVMe. The R440 NVMe variant is best understood as a hybrid platform where NVMe accelerates specific tiers (database logs, cache tier, write-intensive volumes) while SAS/SATA handles bulk capacity.

Second critical calibration: NVMe RAID on 14th gen R440 is software-only. PERC H740P, H730P, H330, and HBA330 do NOT RAID NVMe drives on this platform. NVMe drives present directly to the OS via PCIe routing; for RAID across NVMe, use Intel VROC (Virtual RAID on CPU), Linux mdadm, Windows Storage Spaces, ZFS, or vSAN ESA. Hardware NVMe RAID is a 16th gen capability (R660 with PERC H965i tri-mode). The PERC on the R440 NVMe variant RAIDs the 6 SAS/SATA bays only.

The single most common configuration mistake we catch on R440 NVMe orders is buyers expecting all 10 bays to be NVMe with hardware RAID. The platform topology does not support either expectation. We will not ship a unit without explicit confirmation that the buyer understands both constraints and has a deployment pattern that genuinely fits hybrid 4 NVMe + 6 SAS/SATA with software RAID across the NVMe portion.

When the NVMe Variant Is the Right Choice

The R440 10-Bay 2.5" NVMe earns its place when one of these patterns applies: SQL Server with separated log and data volumes (logs on 2 NVMe mirrored via Storage Spaces or VROC, data on 6 SAS SSD RAID 6 or RAID 10), application servers with NVMe-backed transaction journals or write-ahead logs paired with SAS/SATA application data, Linux servers using bcache or ZFS L2ARC patterns where NVMe is the cache tier and SAS/SATA is the backing store, virtualization hosts that want a small NVMe cache tier alongside SAS/SATA VM datastores, and database deployments where separating hot writes onto NVMe meaningfully improves latency without paying for an all-NVMe platform.

What does not belong on this chassis: workloads needing more than 4 NVMe drives (R640 or R740xd), workloads needing hardware NVMe RAID (16th gen R660 with PERC H965i is the only path), all-NVMe deployments where SAS/SATA bays would be wasted capacity (R740xd 24-Bay NVMe or R640 NVMe variants are the right fit), and workloads where the hybrid pattern of 4 NVMe + 6 SAS/SATA is a forced compromise rather than a genuine architectural match.

The Hybrid NVMe Backplane Architecture

The R440 10-Bay NVMe variant uses Dell's NVMe-capable backplane (a different backplane from the standard 10-Bay 2.5" - confirm part number at quote time against the chassis revision), which routes 4 of the 10 front bays through PCIe lanes to the CPU complex and the other 6 bays through the standard SAS/SATA path. Per Dell's NVMe I/O topology documentation for R440, the first two NVMe drives connect to CPU1 PCIe lanes and the last two NVMe drives connect to CPU2 PCIe lanes.

What this means for the chassis:

• Up to 4 NVMe SSDs maximum, not 10. The platform PCIe lane budget cannot support 10 all-NVMe drives in this 1U chassis.
• Mixed-drive deployment is the design point. The 6 SAS/SATA bays must be populated alongside the NVMe bays (or left empty) - the chassis is hybrid by design, not all-NVMe.
• PCIe slot consumption is real. The NVMe routing consumes PCIe lanes that would otherwise be available for the rear-accessible expansion slots. Effective slot count for other add-in cards drops to roughly 1 to 2 rear slots depending on riser configuration - tighter than the standard 10-Bay variant.
• Dual-CPU strongly preferred. Half the NVMe drives connect via CPU2. Single-CPU configurations leave 2 of the 4 NVMe bays unusable.

Storage - 4 NVMe + 6 SAS/SATA

The NVMe portion of the front bays accepts U.2 NVMe drives. Drive options on the secondary market:

• NVMe Read-Intensive: 1.92 TB, 3.84 TB, 7.68 TB. Volume sweet spot for read-heavy hot tier deployments and cache.
• NVMe Mixed-Use: 1.6 TB, 3.2 TB, 6.4 TB. For write-intensive workloads (database logs, write-ahead journals, transaction commit volumes).
• NVMe Write-Intensive: 1.6 TB, 3.2 TB. Specialized workloads only. Expensive on the secondary market; rarely the right answer when Mixed-Use covers the workload.

For the 6 SAS/SATA bays, the same drive options apply as the standard 10-Bay 2.5" R440 (SAS SSD Read-Intensive and Mixed-Use, SATA SSD, 10K SAS HDD). The most common drive mix on this chassis is 2 to 4 NVMe Mixed-Use for the hot tier paired with 4 to 6 SAS SSD Read-Intensive for the capacity tier.

The canonical use case: separated log and data on SQL Server. A common configuration we ship is SQL Server Standard or Enterprise with transaction log files on 2 NVMe drives (mirrored via Storage Spaces or Intel VROC for resilience) and database files on 6 SAS SSDs in RAID 6 or RAID 10. The hardware PERC handles RAID on the SAS portion; software RAID handles the NVMe pair. This delivers NVMe latency for the write-heavy log volumes without paying for an all-NVMe platform.

Software RAID strategies for the NVMe portion:

• Intel VROC (Virtual RAID on CPU): Intel's software-defined NVMe RAID, accelerated by VMD. Supports RAID 0, 1, 5, 10 across NVMe drives. RAID 5 requires a VROC license key. The closest analog to hardware NVMe RAID on 14th gen.
• OS-native software RAID: Linux mdadm and Windows Storage Spaces are both viable for moderate workloads. Storage Spaces mirroring works cleanly for the SQL Server log-pair pattern; mdadm is the path for Linux deployments.
• ZFS mirror or raidz: Well-supported on Linux for file servers, ZFS-backed virtualization, and specialized deployments where ZFS data integrity features are part of the design.
• vSAN ESA: Technically possible with 4 NVMe drives but uncommon on R440 because the platform memory and CPU envelopes are below vSAN ESA's recommended specs. For vSAN ESA at scale, R640 or R750 are the right platforms.

What does NOT work for NVMe RAID on R440: PERC H740P, H730P, H330, HBA330, HBA350i. None of these RAID NVMe drives on 14th gen. Same constraint as on R640 and R740xd at this generation; hardware NVMe RAID requires PERC H965i tri-mode on 16th gen R660 or R760.

The 6 SAS/SATA bays use the same PERC controllers and the same drive options as the standard R440 10-Bay 2.5" variant. PERC H740P top pick for production, H730P tier below, HBA330 for SDS pass-through.

Boot: BOSS-S1 (two M.2 SATA SSDs, hardware RAID 1, mirrored) is our strongly recommended boot device for production R440 10-Bay NVMe deployments - the OS sits on a mirrored pair off the front bays, the front bays stay reserved for the hybrid NVMe + SAS/SATA storage layout, and boot resilience is independent of any failure on the data tiers. We sell BOSS-S1 as a strongly recommended option, not a mandatory line item: some customers running Linux, ESXi, or other OSes that support alternative boot media boot instead from USB, the internal IDSDM (Internal Dual SD Module), or customer-provided media, which the R440 platform supports. Tell us your boot strategy at quote time and we will spec accordingly.

Storage Controllers

The full Dell PERC controller family is supported on R440 for the SAS/SATA portion of the NVMe variant. Controller selection on this chassis is shaped by the hybrid workload pattern (SAS handling bulk capacity, NVMe handling hot tier via software RAID):

• PERC H740P (8 GB NV cache, battery-backed write-back): Our top pick for the 6 SAS/SATA bays on production NVMe variant deployments. RAID 6 across 6 SAS SSDs benefits from the 8 GB cache and battery backup, particularly when the workload pattern is write-heavy on the SAS tier.
• PERC H730P (2 GB cache, battery-backed): Adequate for read-dominant SAS tier deployments where the H740P premium is not justified.
• PERC H330 (no cache, RAID 0/1/5/10, no battery): Acceptable for lab and dev. Avoid for production SAS data.
• HBA330 (pass-through, no RAID): Required for vSAN OSA, Ceph, Storage Spaces Direct on the SAS portion.
• S140 (software RAID via Intel chipset): SATA-only software RAID. Not recommended for production.

NVMe drives bypass the PERC entirely and present directly to the OS via PCIe. RAID strategy for the NVMe portion is software-only - Intel VROC, mdadm, Storage Spaces, ZFS, or vSAN ESA. PERC10 vs PERC11 mixing rule applies to the SAS/SATA controllers but does not affect NVMe drive operation.

Processors

CPU options: Up to two 1st Generation Intel Xeon Scalable (Skylake-SP, 2017) or 2nd Generation Intel Xeon Scalable (Cascade Lake, 2019) processors on LGA 3647, Intel C621 chipset, up to 24 cores per CPU. Same V1/V2 socket compatibility as the rest of the R440 family.

The R440 TDP ceiling is 150 W per Dell's thermal restriction matrix. Top spec is Gold 6252 (24 cores, 150 W) or Gold 6248 (20 cores, 2.5 GHz, 150 W). R640 supports up to 205 W.

10-bay restriction on high-TDP CPUs applies here too: Per Dell's R440 thermal restriction matrix, drive count caps at 8 on systems with a 135 W processor. On the NVMe variant, this means 135 W+ CPUs cap the chassis at 8 bays total - which on the hybrid backplane would constrain you to 4 NVMe + 4 SAS/SATA at most. For workloads that need 4 NVMe and 6 SAS/SATA fully populated, stay at 125 W CPU or below (Gold 6230, Gold 5218, Silver 4214R).

Our SKU recommendations for the NVMe variant workload mix:

• SQL Server with separated log and data (the canonical workload): Gold 6248 (20 cores, 2.5 GHz, 150 W) for per-core licensing performance, knowing the bay cap drops to 8 - which still allows 4 NVMe + 4 SAS SSDs. Or Gold 5218 (16 cores, 2.3 GHz, 125 W) when full 4 NVMe + 6 SAS/SATA is needed.
• Mixed virtualization with NVMe cache tier: Gold 6230 (20 cores, 2.1 GHz, 125 W) at 125 W keeps all 10 bays populated.
• Linux servers with bcache / ZFS L2ARC: Silver 4214R (12 cores, 100 W) or Silver 4216 (16 cores, 100 W) for cost-balanced builds.

Single-socket vs dual-socket on the NVMe variant: Dual-socket is essentially mandatory on this chassis. Half the NVMe drives connect via CPU2. Single-CPU configurations leave 2 of the 4 NVMe bays unusable, which defeats the purpose of choosing the NVMe variant in the first place. We do not quote single-CPU NVMe configurations in production.

Memory

Architecture: 16 DDR4 DIMM slots, asymmetric topology that is R440-specific. CPU1 supports up to 10 DIMMs (4 channels at 2 DPC + 2 channels at 1 DPC), CPU2 supports up to 6 DIMMs (6 channels at 1 DPC). Six memory channels per CPU.

Memory speed: 2666 MT/s flat. R440 does not hit 2933 MT/s on Cascade Lake even at 1 DPC. For databases that are memory-bandwidth-bound (in-memory OLTP, large buffer pools), R640 with 2933 MT/s on V2 at 1 DPC is the step up.

Supported DIMM types per Dell technical guide:

• RDIMM: Standard enterprise choice. Per Dell's R440 spec sheet, RDIMM caps at 512 GB total. SQL Server deployments often size at 256 to 512 GB on this chassis class.
• LRDIMM: Up to 1 TB total. Dell notes 768 GB as the recommended max for performance-optimized configurations. LRDIMM is the path when total memory exceeds the 512 GB RDIMM ceiling.
• UDIMM: Not supported on R440.
• NVDIMM-N / Apache Pass / Intel Optane Persistent Memory: Not supported on R440. R740 is the path for persistent memory workloads, and persistent memory is sometimes an alternative architecture to NVMe-for-logs depending on the workload.

Memory sizing by workload: SQL Server with separated log and data: 256 to 512 GB depending on buffer pool requirements. Application server with NVMe transaction journals: 128 to 256 GB. Linux with bcache or L2ARC: 192 to 384 GB (ZFS in particular benefits from ample ARC memory). Virtualization with NVMe cache tier: 256 to 512 GB depending on VM count and density.

Mixing rules: Match ranks, capacity, and timing within a channel. RDIMM and LRDIMM cannot mix. We do not quote mixed configurations for production. All DIMMs must be DDR4.

Networking and NDC Options

R440 carries 2x 1 GbE embedded NIC ports on the motherboard plus a Network Daughter Card (LOM riser) slot that does not consume a PCIe slot. LOM riser options per Dell's R440 technical guide:

• 2x 1 GbE LOM riser: Acceptable for management-plane-only deployments where the data plane is on PCIe NICs.
• 2x 10 GbE BASE-T: Copper 10 GbE for cabled environments.
• 2x 10 GbE SFP+: The baseline for most R440 NVMe variant deployments. SQL Server log shipping, application traffic, and replication traffic all benefit from 10 GbE.

NDC budget is especially relevant on this chassis because the NVMe controller routing consumes PCIe slot budget for any add-in NICs. The LOM riser does not eat into the 2 rear PCIe slots, which makes 10 GbE on the LOM the right answer when PCIe slot budget is tight. No 25 GbE on the R440 LOM riser per Dell's technical guide; 25 GbE on R440 requires a PCIe add-in card consuming one of the 1 to 2 remaining rear slots. R640 supports 2x 25 GbE on its LOM riser directly.

PCIe Expansion

The R440 PCIe topology per Dell's R440 Installation and Service Manual:

• Right riser: One x16 PCIe Gen3 slot, configurable for low-profile half-length or full-height half-length cards. Connected to CPU1.
• Left riser: One x16 PCIe Gen3 slot, low-profile half-length only. Connected to CPU2. Inactive in single-CPU configurations.
• LOM riser: x8 PCIe Gen3 dedicated for the OCP-form-factor LOM card. Does not count against the 2 expansion slots.
• Internal riser: x8 PCIe Gen3 dedicated for the internal PERC controller. Does not count against the 2 expansion slots.

NVMe variant slot budget is tighter than the standard 10-Bay: The NVMe-capable backplane consumes PCIe lanes from the CPU complex that would otherwise feed the rear risers. Effective rear-slot count for other add-in cards drops to roughly 1 to 2 slots depending on riser configuration (vs the full 2 rear slots on the standard 10-Bay). Multi-card builds requiring HBA plus dual NIC plus other expansion are structurally tight on this chassis - for workloads needing a 3-slot PCIe budget plus NVMe, R640 with its 3 rear slots is the better platform.

All slots are PCIe Gen3. R440 NVMe drives run at PCIe Gen3 x4 (around 3.94 GB/s theoretical per drive). Modern NVMe SSDs with Gen4 capability are bottlenecked to half their potential bandwidth. For Gen4 NVMe at line rate, R450 (15th gen) is the upgrade; for Gen5, R460 (16th gen).

GPU Support

The R440 does not support GPU acceleration. Per Dell's R440 thermal restriction matrix, non-Dell-qualified peripheral cards and peripheral cards greater than 25 W are not supported. NVIDIA T4 (70 W), Tesla P4 (50 to 75 W), and even entry-tier cards above 25 W are blocked. The 1U thermal envelope and 550 W PSU ceiling cannot deliver the power or cooling budget for accelerators.

If your workload pairs NVMe with GPU compute (machine learning inference with NVMe-backed data sets, for instance), R440 is the wrong platform. The path on 14th gen is R740xd 24-Bay 2.5" with up to 3 double-wide GPUs plus NVMe capacity. For current production, R760 with PCIe Gen5 and modern accelerator support is the upgrade.

Management - iDRAC9 Generation

iDRAC9 Enterprise is the right tier for production R440 NVMe variant deployments. Full remote KVM, virtual media, group management via OpenManage Enterprise, lifecycle controller for firmware updates without OS involvement. iDRAC9 Express is insufficient for unattended deployment. We spec Enterprise on every production BOM.

Security baseline: Silicon Root of Trust anchors firmware verification in immutable silicon. TPM 2.0 module supported and recommended. Secure Boot, System Lockdown, signed firmware updates, and System Erase are all supported. R440 with iDRAC9 Enterprise and TPM 2.0 meets HIPAA, PCI DSS, NIST 800-171, CMMC, and FedRAMP requirements in 2026.

Lifecycle Controller and OpenManage Enterprise: Same Dell management plane as the rest of the 14th gen family. SQL Server clusters and application server fleets benefit from OpenManage Enterprise's centralized firmware compliance and configuration drift detection. Quick Sync 2 BLE/Wi-Fi module supported for at-server mobile management.

Power and Cooling

R440 PSU options per Dell's R440 spec sheet:

• 450 W Bronze cabled: Single PSU, no hot-plug, no redundancy. Not appropriate for production NVMe variant deployments - database workloads with NVMe-backed logs cannot tolerate single-PSU configurations.
• 550 W Platinum hot-plug redundant: Paired PSUs with hot-plug capability and active redundancy. Required for any production NVMe variant deployment.

No 750 W, 1100 W, or Titanium tier on R440. R640's higher PSU range does not exist on R440. The NVMe variant draws slightly less aggregate power than the standard 10-Bay because NVMe SSDs typically draw less than SAS HDDs (2 to 6 W per NVMe SSD vs 8 to 12 W per SAS HDD), so the 550 W envelope is not heavily constrained on this configuration.

Estimated draw for representative NVMe variant builds:

• Light (Silver 4214R, 128 GB RAM, 2 NVMe + 4 SAS SSD): Approximately 200 to 220 W peak.
• Balanced SQL Server (Gold 6230, 256 GB RAM, 4 NVMe + 6 SAS SSD): Approximately 320 to 360 W peak.
• Database at thermal limits (Gold 6248 at 150 W, 512 GB RAM, 4 NVMe + 4 SAS SSD - 8 bays max at this CPU tier): Approximately 410 to 450 W peak.

Cooling: Up to six cabled fans. R440 fans are cabled, not hot-plug - fan failure requires scheduled downtime. For mission-critical SQL Server deployments where any planned downtime is expensive, R640's hot-plug fans are part of the case for stepping up.

Physical Specs & Platform Notes

• Form factor: 1U rack server. 42.80 mm H x 482.0 mm W (with rack ears; 434 mm chassis-only) x approximately 714 mm D with bezel on the 10 x 2.5" configuration (Dell's spec sheet documents 714.58 mm front-bezel-to-rear-PSU-handle for the 10 x 2.5" chassis). Weight 17.6 kg (38.9 lbs). Dell ReadyRails II static or sliding rails.
• PCIe expansion: Effectively 1 to 2 rear-accessible PCIe Gen3 slots after the NVMe backplane routing consumes lane budget (tighter than the standard 10-Bay variant's 2 rear slots).
• Parts availability: Good but the NVMe-capable backplane is less common on the secondary market than the standard 10-Bay 2.5" backplane. PERC controllers, NDC cards, riser kits, fan modules, and PSUs are the same as the rest of the R440 family. NVMe SSDs are widely available; we assess remaining endurance via SMART data on every refurbished NVMe.
• Accessories we recommend: Dell LCD bezel (security or non-security variant, confirm part number at quote time against your chassis revision), the Dell A11 drop-in sliding rails (fits R440/R450/R650), and the Dell cable management arm (CMA).
• Platform notes: BOSS-S1 is our strongly recommended boot device on production builds; USB, IDSDM internal dual MicroSD, and customer-provided media are supported alternatives for Linux, ESXi, and other OSes that boot cleanly from those paths. CPU hot-plug is not supported. Drive bays are hot-swap (both NVMe and SAS/SATA). Bay configuration is welded into the chassis - the NVMe-capable backplane cannot be field-converted to standard 10-Bay, 8-Bay, or 4-Bay 3.5". The 4-NVMe-max constraint is platform-architectural and cannot be expanded with backplane swaps.

Our Assessment

Where it excels: SQL Server with separated transaction log (NVMe mirrored) and database file (SAS SSD RAID 6 or RAID 10) deployments. Application servers with NVMe-backed transaction journals or write-ahead logs paired with SAS/SATA application data. Linux servers using bcache or ZFS L2ARC patterns. Virtualization hosts that want a small NVMe cache tier alongside SAS/SATA VM datastores. Database deployments where separating hot writes onto NVMe meaningfully improves latency without paying for an all-NVMe platform. Workloads where the hybrid 4 NVMe + 6 SAS/SATA pattern is the natural architectural fit.

Where to look instead: Workloads needing more than 4 NVMe drives belong on R640 (up to 10 NVMe in flex-zoning) or R740xd 24-Bay NVMe (up to 24 dedicated NVMe). Workloads needing hardware NVMe RAID belong on 16th gen R660 or R760 with PERC H965i tri-mode. Workloads where SAS/SATA bays would be wasted capacity belong on R740xd 24-Bay NVMe for all-NVMe at scale. GPU-plus-NVMe workloads belong on R740xd 24-Bay 2.5" or current-gen R760. Workloads needing more than 1 TB memory or 2933 MT/s memory speed belong on R640 or R740. All-SAS/SATA deployments without NVMe requirements belong on the standard R440 10-Bay 2.5" companion (more PCIe slot budget) or the R440 8-Bay 2.5" for cost-balanced builds.

Bottom line: The R440 NVMe variant is a specialty configuration with a specific architectural fit: hybrid hot-tier-plus-capacity workloads where 4 NVMe drives accelerate the critical path and 6 SAS/SATA drives carry bulk storage, with software RAID across the NVMe portion. The buyer expectations that need calibration up front are real (not 10 NVMe, not hardware NVMe RAID) and we catch them before quote close. For workloads that genuinely fit the hybrid pattern, this is the right chassis at the R440 value tier. For workloads where the hybrid is a forced compromise rather than a design point, one of the R440 companions or R640 / R740xd is the better answer.

Generation Context

R440 is 14th gen Dell PowerEdge (Skylake-SP and Cascade Lake, 2017-2019). NVMe-specific generational context matters more on this chassis than on the SAS/SATA companions:

• vs 15th gen R450: R450 brings PCIe Gen4 NVMe (doubled per-drive bandwidth) and PCIe Gen4 host platform. If single-drive NVMe throughput is the bottleneck, R450 is the upgrade. If 4 NVMe drives at PCIe Gen3 line rate covers the workload, R440 NVMe still wins on cost-per-node.
• vs 16th gen R660: R660 brings PCIe Gen5 NVMe, PERC H965i tri-mode (hardware NVMe RAID without software-RAID complexity), DDR5 5600 MT/s, and up to 56-64 cores per socket. For workloads that specifically need hardware NVMe RAID, R660 is the only Dell path; software RAID across NVMe on R440 is a viable but more complex alternative.
• vs R640 NVMe variants: R640 supports up to 10 NVMe in flex-zoning configurations - 2.5x the NVMe capacity of R440 in the same 1U form factor, with the enterprise-tier PSU range, memory ceiling, and PCIe slot count. Step up to R640 NVMe when the workload genuinely needs more than 4 NVMe drives.

vs the R440 companions on the same platform: the canonical 4-Bay 3.5" is the LFF capacity variant. The 10-Bay 2.5" is the SAS/SATA SFF density variant with more PCIe slot budget than the NVMe variant. The 8-Bay 2.5" is the cost-balanced SFF option. HPE counterpart: HPE ProLiant DL360 Gen10 carries similar NVMe-capable backplane options on the same Purley generation.

Honest Limitations

• 4 NVMe maximum, not 10. The most important constraint on this chassis. Despite the SKU name, only 4 of the 10 bays can be NVMe. The other 6 are SAS/SATA only. The platform PCIe lane budget cannot support 10 all-NVMe drives.
• Software-only NVMe RAID. PERC H740P, H730P, H330, and HBA330 do not RAID NVMe on 14th gen R440. Use Intel VROC, mdadm, Storage Spaces, or ZFS. Hardware NVMe RAID requires 16th gen R660 with PERC H965i.
• PCIe slot count is reduced vs the standard 10-Bay. NVMe routing consumes PCIe lane budget. Effective rear slot count drops to 1 to 2 depending on riser config.
• Dual-CPU strongly preferred. Half the NVMe drives connect via CPU2. Single-CPU leaves 2 of the 4 NVMe bays unusable. We do not quote single-CPU NVMe configurations in production.
• PCIe Gen3 ceiling on NVMe drives. Each NVMe drive runs at PCIe Gen3 x4 (around 3.94 GB/s theoretical). Modern Gen4-capable NVMe SSDs are bottlenecked to half their potential bandwidth. For Gen4 NVMe at line rate, R450 (15th gen); for Gen5, R460 (16th gen).
• 135 W+ CPU caps bay count at 8. Per Dell's thermal restriction matrix. On the NVMe variant, this means 4 NVMe + 4 SAS/SATA at most when running 135 W+ CPUs. For full 4 NVMe + 6 SAS/SATA, stay at 125 W or below.
• 2666 MT/s memory ceiling. R440 does not hit 2933 MT/s on Cascade Lake. SQL Server with very large buffer pools benefits from R640's higher memory speed.
• 16-DIMM asymmetric topology, 1 TB LRDIMM / 512 GB RDIMM ceiling. Below R640's 3 TB.
• NVDIMM-N and Intel Optane Persistent Memory not supported. R740 family is the path.
• No GPU support. 25 W peripheral card ceiling. R740xd 24-Bay 2.5" is the path for GPU plus NVMe at this generation.
• PSU tops at 550 W Platinum. No 750 W, no 1100 W, no Titanium.
• Cabled fans, not hot-plug.
• No 25 GbE on the LOM riser. PCIe add-in card required for 25 GbE, consuming one of the already-tight 1 to 2 rear PCIe slots.
• 150 W CPU TDP ceiling. R640 supports up to 205 W.
• 14th gen, not current production. Strong refurbished value in 2026 but the NVMe-specific generational deltas (Gen4 / Gen5, hardware NVMe RAID) are larger than on the SAS/SATA chassis variants.

Workload Fit

Where to Look Instead

• Need more than 4 NVMe drives? R640 supports up to 10 NVMe in flex-zoning. R740xd 24-Bay NVMe supports up to 24 dedicated NVMe.
• Need hardware NVMe RAID? 16th gen R660 or R760 with PERC H965i tri-mode is the only Dell path.
• Don't need NVMe at all? The standard R440 10-Bay 2.5" companion has 10 SAS/SATA bays and more PCIe slot budget for other expansion. The R440 8-Bay 2.5" is the cost-balanced SFF option.
• Need LFF capacity? The canonical R440 4-Bay 3.5" is the LFF variant on the same platform.
• Need entry-tier 1U at lower cost? The R340 8-Bay 2.5" is the Xeon E single-socket entry-tier, the step down from the R440 when 8 cores and 128 GB UDIMM cover the workload and NVMe is not required.
• Outgrowing the R440 envelope? The R640 10-Bay 2.5" NVMe is the enterprise-tier 1U NVMe equivalent with up to 10 NVMe, 3 TB memory, 2933 MT/s, 3 PCIe slots, 25 GbE LOM option, GPU support, and higher PSU tiers.
• Need 2U with NVMe at scale? The R740xd 24-Bay 2.5" family supports up to 24 NVMe drives with 8 PCIe slots and 24 DIMM slots.
• HPE counterpart? The HPE ProLiant DL360 Gen10 with NVMe-capable backplane is the closest 1U Purley peer.
• Need PCIe Gen4 NVMe bandwidth? R450 (15th gen, Gen4) or R460 (16th gen, Gen5) are the path.

Ready to Configure?

Tell us your workload (SQL Server with log-data separation, application server with NVMe journals, Linux with bcache or L2ARC, virtualization with NVMe cache tier), target CPU class (and we will flag the 135 W bay-count restriction up front - it caps total bays at 8 on this chassis just like the standard 10-Bay), memory capacity, drive configuration (specifically how the 4 NVMe bays and 6 SAS/SATA bays will be used - log/data separation, cache tier, hybrid deployment), software RAID strategy for the NVMe portion (Intel VROC, mdadm, Storage Spaces, ZFS), boot strategy (BOSS-S1, USB, IDSDM, or customer-provided media), NDC choice, and quantity. Our account team returns a fully validated configuration with formal pricing within 24 hours, including NVMe endurance assessment via SMART data and clear flagging of the 4-NVMe-max constraint and software-RAID requirement before quote close. Every refurbished unit ships with our 180-day warranty and 12+ hour burn-in testing, and volume pricing starts at 5 units. Call 1-800-778-1545 or use the quote form below.