DELL PowerEdge R640 Server
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Condition
Refurbished
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CPU
2×8GB DDR4 RDIMM 2133MHz
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RAM
noHDD (up to 8 HDD 2.5'' SFF)
-
Condition
Refurbished
-
CPU
2×8GB DDR4 RDIMM 2133MHz
-
RAM
noHDD (up to 8 HDD 2.5'' SFF)
-
Condition
Refurbished
-
CPU
2×8GB DDR4 RDIMM 2133MHz
-
RAM
noHDD (up to 8 HDD 2.5'' SFF)
-
Condition
Refurbished
-
CPU
2×8GB DDR4 RDIMM 2133MHz
-
RAM
noHDD (up to 8 HDD 2.5'' SFF)
Processor
Up to 2 x 2nd Generation Intel® Xeon® Scalable processors, up to 28 cores per processor
Memory
DDR4: up to 24 x RDIMM/LRDIMM (3 TB), speed up to 2933 MT/s, registered ECC only; optional NVDIMM and Intel Optane PMem support
Storage controllers
- Internal RAID: PERC H330, H730P, H740P, HBA330
- External: H840, 12Gbps SAS HBA
- Software RAID: S140
- Boot: BOSS HWRAID 2 x M.2 SSDs, IDSDM
Drive bays
Front bays
- Up to 10 x 2.5-inch SAS/SATA (HDD/SSD) with up to 8 NVMe SSD
- Up to 10 x 2.5-inch NVMe drives
- Up to 4 x 3.5-inch SAS/SATA HDD
Rear bays
- Up to 2 x 2.5-inch SAS/SATA/NVMe (HDD/SSD)
Power supplies
- 495 W Platinum
- 750 W Platinum/Titanium
- 1100 W Platinum
- 1600 W Platinum
Cooling and fans
Air cooling; up to 8 hot-plug fans with full redundancy
Dimensions
- Height: 42.8 mm (1.69 inches)
- Width: 482.0 mm (18.98 inches)
- Depth: 808.5 mm (31.8 inches)
- Weight: 21.9 kg (48.3 lb)
Form factor
1U rack server
Embedded management
- iDRAC9
- iDRAC Direct
- iDRAC RESTful API with Redfish
- Quick Sync 2 optional
Security
- TPM 1.2/2.0 optional, TCM 2.0 optional
- Cryptographically signed firmware
- Silicon Root of Trust
- Secure Boot
- System Lockdown
- Secure Erase
Networking
- NDC options: 4 x 1GbE, 2 x 10GbE + 2 x 1GbE, 4 x 10GbE or 2 x 25GbE
GPU options
Up to 3 x single-width GPUs or 1 x FPGA
Ports
Front ports
- 1 x Dedicated iDRAC Direct USB
- 1 x USB 2.0
- 1 x USB 3.0 optional
- 1 x Video
Internal ports
- N/A
Rear ports
- 1 x Dedicated iDRAC network port
- 1 x Serial
- 2 x USB 3.0
- 1 x Video
PCIe
Up to 3 x PCIe Gen3 slots all x16
Operating systems
- Canonical Ubuntu LTS
- Citrix Hypervisor
- Microsoft Windows Server LTSC with Hyper-V
- Red Hat Enterprise Linux
- SUSE Linux Enterprise Server
- VMware ESXi
Dell PowerEdge R640 overview
Dell PowerEdge R640 is a dense 1U, dual-socket rack server for dense virtualization, database, web, software-defined storage and scale-out data center workloads. It is designed for environments that need a careful balance of compute performance, memory capacity, storage flexibility, management features and long-term serviceability.
The R640 server is based on up to two 2nd Generation Intel Xeon Scalable processors. It supports 24 DDR4 RDIMM/LRDIMM slots, up to 3 TB, speeds up to 2933 MT/s, with NVDIMM-N and Intel Optane DC Persistent Memory support in selected configurations, Dell iDRAC management through iDRAC9, network daughter card options including 1GbE, 10GbE and 25GbE choices, up to 3 PCIe Gen3 x16 slots and up to 10 x 2.5-inch SAS/SATA/NVMe drives, up to 10 NVMe drives, or up to 4 x 3.5-inch SAS/SATA drives, with optional rear 2SFF drives.
Dell PowerEdge R640 is suitable for the workload categories listed below and should be treated as a dense 1U performance platform, not a storage-heavy 2U server. Compared with newer or larger Dell PowerEdge platforms, this model should be selected when its generation, form factor, storage layout and cost profile match the project.
When to choose Dell PowerEdge R640
Choose Dell PowerEdge R640 when the workload needs dense 1U, dual-socket rack server characteristics, predictable local storage and Dell PowerEdge management. It is a good fit for dense virtualization, database, web, software-defined storage and scale-out data center workloads.
Compared with smaller or entry platforms, Dell PowerEdge R640 provides more appropriate headroom for its target role. Compared with larger or newer PowerEdge systems, it should be selected when acquisition cost, compatibility with existing infrastructure and the exact drive layout are more important than the latest platform generation.
The R640 configuration should be validated carefully for processor count, memory population, drive bay layout, storage controller, boot device, risers, network adapters, power supplies, fans and cooling. This is especially important for NVMe, rear-drive, GPU, redundant power and mixed-drive configurations.
Chassis and drive bay options
Dell PowerEdge R640 supports the following practical chassis, drive and configuration options. The right choice depends on whether the server is being configured for capacity, SSD responsiveness, NVMe performance, boot separation, redundant power or accelerator support.
| Chassis option | Best for | Comment |
|---|---|---|
| Dell PowerEdge R640 8SFF | 2.5-inch SSD/HDD density, serviceability and business applications | Use this option when 2.5-inch density, SSD responsiveness and serviceability are more important than 3.5-inch HDD capacity. Supports up to 8 x 2.5-inch SAS/SATA/NVMe drives in selected configurations. |
| Dell PowerEdge R640 10SFF | SSD responsiveness, NVMe performance and latency-sensitive workloads | Use this option when low-latency SSD or NVMe performance is required. Supports up to 10 x 2.5-inch drives, including up to 10 NVMe drives or mixed SAS/SATA/NVMe layouts; confirm backplane, controller, cabling and thermal rules. |
| Dell PowerEdge R640 12SFF | 2.5-inch SSD/HDD density, serviceability and business applications | Use this option when 2.5-inch density, SSD responsiveness and serviceability are more important than 3.5-inch HDD capacity. Supports front and rear SFF layout for selected dense drive configurations. |
| Dell PowerEdge R640 BOSS / rear drive options | separating OS or hypervisor boot from data drives | Use this option to keep OS or hypervisor boot separate from the main front drives. Supports BOSS hardware RAID with 2 x M.2 SSDs and optional rear 2 x 2.5-inch drive support; confirm OS and controller support before ordering. |
| Dell PowerEdge R640 GPU / FPGA options | validated accelerator, VDI or GPU-enabled workloads | Use only validated accelerator combinations. Supports up to 3 single-width NVIDIA T4 GPUs or up to 1 FPGA, depending on riser and thermal configuration; check risers, power cables, fans and thermal limits. |
For capacity workloads, LFF configurations are usually the practical starting point. For latency-sensitive databases, virtualization datastores and high-IO workloads, SFF SSD or NVMe-capable configurations should be considered where the platform supports them.
Final drive compatibility depends on the selected chassis, backplane, controller, cables, risers, cooling configuration and Dell support matrix. Do not assume that every drive type, controller and rear-drive option can be combined in one configuration.
Recommended Dell PowerEdge R640 configurations by workload
| Workload | Recommended focus |
|---|---|
| Virtualization / private cloud | Balanced CPU count, large memory pool, SSD or NVMe storage where supported, redundant networking and validated boot media. |
| Databases / data management | Processor choice matched to licensing and query profile, enough RAM for cache, low-latency SSD or NVMe storage and protected arrays. |
| Containers / Kubernetes | Balanced CPU and RAM, reliable boot device, fast local SSD when needed and redundant network connectivity for cluster traffic. |
| Software-defined storage / HCI | Drive layout, HBA/JBOD or controller mode, network bandwidth and CPU/RAM sized for the selected SDS or HCI platform. |
| VDI | High RAM density, predictable CPU performance, fast storage and validated GPU options when graphics acceleration is required. |
| Web and application services | Balanced CPU, enough memory, SSD-backed local storage and network options sized for application traffic. |
| GPU-accelerated workloads | Validated GPU or FPGA model, risers, power cables, cooling limits and memory sizing checked before purchase. |
| Mixed enterprise workloads | Balanced CPU, RAM, storage and NIC choices, with headroom for failover, maintenance and growth. |
The R640 configuration should be chosen around the main reason for selecting this platform: a dense 1U performance platform, not a storage-heavy 2U server, 24 DDR4 DIMM slots / up to 3 TB plus selected NVDIMM or PMem options, 8SFF, 10SFF, 12SFF/NVMe or 4LFF layouts depending on chassis, Dell iDRAC9 management and a validated power, cooling and controller design.
How to choose CPU, RAM, RAID and storage
Dell PowerEdge R640 supports up to two 2nd Generation Intel Xeon Scalable processors. CPU choice should be tied to workload profile, software licensing and thermal limits. up to 28 cores per processor help when virtualization, databases or multi-user services need more parallelism, while higher clock speed can matter for applications sensitive to per-core performance.
RAM planning should start with VM density, database cache requirements, application growth and backup or monitoring agents. Dell PowerEdge R640 supports 24 DDR4 RDIMM/LRDIMM slots, up to 3 TB, speeds up to 2933 MT/s, with NVDIMM-N and Intel Optane DC Persistent Memory support in selected configurations. Memory speed and maximum capacity depend on processor choice and DIMM population, so the final layout should be validated before ordering.
For storage, use 8SFF, 10SFF, 12SFF/NVMe or 4LFF layouts depending on chassis when it matches the workload. up to 10 x 2.5-inch SAS/SATA/NVMe drives, up to 10 NVMe drives, or up to 4 x 3.5-inch SAS/SATA drives, with optional rear 2SFF drives. Boot devices such as BOSS or internal M.2 options can separate OS or hypervisor boot from the main data drives where supported.
RAID and HBA choice should be made before finalizing drive count. PERC H330, H730P, H740P, HBA330, H840, 12Gbps SAS HBA, S140 and BOSS M.2 boot. Hardware RAID is appropriate for classic protected arrays, while HBA/JBOD or software RAID may be better for selected software-defined storage designs.
Network, GPU and power choices should also be checked as a single configuration. Dell PowerEdge R640 includes or supports network daughter card options including 1GbE, 10GbE and 25GbE choices, up to 3 PCIe Gen3 x16 slots, up to 3 single-width NVIDIA T4 GPUs or up to 1 FPGA in supported configurations, and 495W, 750W, 1100W and 1600W hot-plug redundant power supplies, with selected DC/HVDC options. Validate risers, airflow and power supply redundancy before purchase.
Dell PowerEdge R640 vs related Dell PowerEdge models
| Model | When to consider |
|---|---|
| Dell PowerEdge R440 | Choose R440 when a compact 1U dual-socket server is needed for dense scale-out infrastructure. |
| Dell PowerEdge R540 | Choose R540 when a 2U value platform with larger LFF capacity is more important than maximum rack density. |
| Dell PowerEdge R740 | Choose R740 when a mainstream 2U dual-socket platform with more accelerator and expansion flexibility is required. |
| Dell PowerEdge R740xd | Choose R740xd when a storage-optimized 2U server with extensive SFF, LFF, NVMe, mid-bay or rear-bay options is required. |
| Dell PowerEdge R660 | Choose R660 when a newer DDR5 1U dual-socket platform is preferred for dense virtualization or database workloads. |
| Dell PowerEdge R760 | Choose R760 when a newer DDR5 2U platform is preferred for performance, NVMe and modern accelerator support. |
Dell PowerEdge R640 should be evaluated against the related Dell PowerEdge models above, because form factor, processor generation, memory type, drive layout and expansion strategy have a direct impact on workload fit.
Summary: is Dell PowerEdge R640 the right server for your workload×
Dell PowerEdge R640 is a practical Dell PowerEdge platform for dense virtualization, database, web, software-defined storage and scale-out data center workloads. Choose it when you need 2nd Gen Intel Xeon Scalable, 24 DDR4 DIMM slots / up to 3 TB plus selected NVDIMM or PMem options, 8SFF, 10SFF, 12SFF/NVMe or 4LFF layouts depending on chassis, Dell iDRAC9 management and a configuration that fits the server generation and workload profile.
Before purchase, confirm processor model, CPU count, RAM population, chassis type, drive support, RAID or HBA mode, BOSS or M.2 boot option, networking, optional GPU support, power supply redundancy, cooling and warranty requirements.
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