Dell PowerEdge T640
The Dell PowerEdge T640 is an enterprise tower server powered by 2 Intel Xeon Scalable 1st Gen and 2nd Gen (up to 28 cores, 205W TDP) and 24 memory slots supporting up to 3072GB DDR4-2666 / DDR4-2933 RDIMM / LRDIMM. Configured with Up to 32x 2.5-inch SAS/SATA/NVMe or 18x 3.5-inch SAS/SATA drives and Up to 8 PCIe Gen3 slots, the T640 delivers balanced compute and I/O density for enterprise database, hypervisor, and application workloads.
Also written as: PowerEdge T640, Dell T640, T640 Tower Server
Specifications
| Brand | Dell |
|---|---|
| Family | PowerEdge T |
| Form factor | tower |
| Released | Sep 2017 |
| End of sale | May 2023 |
| End of support | Jun 2028 |
| Cpu sockets | 2 |
| Cpu platform | Intel Xeon Scalable 1st Gen and 2nd Gen (up to 28 cores, 205W TDP) |
| Memory slots | 24 |
| Memory type | DDR4-2666 / DDR4-2933 RDIMM / LRDIMM |
| Memory max (GB) | 3,072 |
| Drive bays | Up to 32x 2.5-inch SAS/SATA/NVMe or 18x 3.5-inch SAS/SATA drives |
| Pcie slots | Up to 8 PCIe Gen3 slots |
| Gpu support | Up to 4x 300W double-wide or 8x single-wide GPUs |
| Network onboard | 2x 10GbE + 2x 1GbE LOM ports; 1x 1GbE iDRAC9 port |
| Power supply | Dual redundant hot-plug 495W, 750W, 1100W, 1600W, 2000W or 2400W |
Generations
- Previous generation: Dell PowerEdge T630
- Next generation: Dell PowerEdge T560
About the T640
The Dell PowerEdge T640 is an enterprise tower server engineered for computing and virtualization workloads. Powered by 2 Intel Xeon Scalable 1st Gen and 2nd Gen (up to 28 cores, 205W TDP) across 24 memory slots supporting up to 3072GB DDR4-2666 / DDR4-2933 RDIMM / LRDIMM, the T640 balances throughput and memory capacity. In Dell's server catalog, the T640 succeeded the POWEREDGE-T630 and was followed by the POWEREDGE-T560, positioned alongside rival systems including PROLIANT-ML350-GEN10, THINKSYSTEM-ST550.
Options and compatibility
Processor support on the T640 utilizes 2 LGA3647 (Socket P0) sockets with thermal heatsinks matching CPU power envelopes. System memory slots on the T640 require DDR4-2666 / DDR4-2933 RDIMM / LRDIMM modules, and mixing RDIMM with LRDIMM memory is not supported. The T640 tower chassis accepts X7K8W (3.5-inch LFF) drive carriers depending on backplane selection. Networking on the T640 uses Network Daughter Card (NDC), and expansion cards install into Up to 8 PCIe Gen3 slots risers.
How to identify it
Physical identification of the T640 is verified by the 14th-generation silver-gray brushed aluminum honeycomb bezel with the T640 badge on the front chassis ear. The pull-out information tag on the T640 control panel displays the 7-character Dell Service Tag and default login credentials. In iDRAC9, the server identifies as T640 with active firmware, slot mapping, and power telemetry.
Buying used
When evaluating a pre-owned T640, inspect the LGA3647 (Socket P0) CPU socket pins for damage and ensure retention clips are intact. Run Dell ePSA diagnostics across all 24 memory slots of the T640 to verify zero uncorrectable ECC faults under load. Verify that redundant power supplies in the T640 match in wattage and that iDRAC9 Enterprise remote console is enabled. Ensure required T640 drive caddies and bracket accessories are present.
Compatible parts
Memory
370-AAFW Dell 32GB 2Rx4 DDR4-2933 RDIMM ECC Registered Memory
370-ADNG Dell 32GB DDR4-2666 Dual Rank Registered ECC RDIMM
370-ADNH Dell 64GB DDR4-2666 Quad Rank LRDIMM Memory Module
Boot devices
400-BDBR Dell BOSS-S1 M.2 240GB SATA 6Gb/s Enterprise Solid State Drive
BOSS-S1 Dell Boot Optimized Storage Solution (BOSS-S1) PCIe Card with Dual M.2 SSDs
Rail kits
770-BBBM Dell PowerEdge Tower-to-Rack Conversion Rail Kit for T640/T630
RAID controllers
PERC-H740P Dell PERC H740P 12Gb/s SAS 8GB NV Cache PCIe / Mini Mono RAID Controller
PERC-H730P Dell PERC H730P 12Gb/s SAS 2GB NV Cache Mini Mono / PCIe RAID Controller
Works together
How the Dell PowerEdge T640 connects to servers, storage and the network: 4 ways, with the parts and products on each path.
Fibre Channel SAN
Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).
Adapters for the server (check the fit list)
540-BBUU Dell Emulex LPe31002 Dual Port 16Gb Fibre Channel Host Bus Adapter
540-BBUV Dell QLogic 2692 Dual Port 16Gb Fibre Channel Host Bus Adapter
540-BCMS Dell QLogic 2770 Single Port 32Gb Fibre Channel PCIe Adapter
540-BCMT Dell QLogic 2772 Dual Port 32Gb Fibre Channel PCIe Adapter
Switches
Lenovo ThinkSystem DB610S 1U rack
Lenovo ThinkSystem DB630S 2U rack
Lenovo ThinkSystem DB730S 2U rack
Storage
Dell PowerVault ME4012 2U rack
Dell PowerVault ME4024 2U rack
Dell PowerVault ME4084 5U rack
Dell Unity XT Unity 300 2U rack
Dell Unity XT Unity 400 2U rack
Dell Unity XT 380F 2U rack
Optics
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Adapters for the server (check the fit list)
540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
540-BBGP Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 OCP 3.0 Adapter
540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
Switches
Dell PowerSwitch S4128F-ON 1U rack
Dell PowerSwitch S4148F-ON 1U rack
Storage
- Dell PowerVault ME4012 2U rack
- Dell PowerVault ME4024 2U rack
- Dell Unity XT Unity 300 2U rack
- Dell Unity XT Unity 400 2U rack
- Dell Unity XT 380F 2U rack
Dell Unity XT 380XT 2U rack
Optics
Direct-attached SAS
12Gb SAS uses Mini-SAS HD (SFF-8644) connectors; older 6Gb gear uses Mini-SAS (SFF-8088). Adapter cables exist, but the link runs at the slower speed.
Adapters for the server (check the fit list)
405-AANT Dell 12Gbps SAS HBA Dual Port External PCIe Controller
405-AASU Dell HBA355e External SAS 12Gb/s Host Bus Adapter
Storage
- Dell PowerVault ME4012 2U rack
- Dell PowerVault ME4024 2U rack
- Dell PowerVault ME4084 5U rack
Dell PowerVault MD1400 2U rack
Dell PowerVault MD1420 2U rack
Dell PowerVault MD3400 2U rack
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Adapters for the server (check the fit list)
- 540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
- 540-BBGP Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 OCP 3.0 Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
Switches
- Dell PowerSwitch S4128F-ON 1U rack
- Dell PowerSwitch S4148F-ON 1U rack
Storage
- Dell Unity XT Unity 300 2U rack
- Dell Unity XT Unity 400 2U rack
- Dell Unity XT 380F 2U rack
- Dell Unity XT 380XT 2U rack
Dell Unity XT 480F 2U rack
Dell Unity XT 480XT 2U rack
Optics
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- SAN transport and NVMe over FC for backup mrplanb.com
- Dell E-Lab Navigator (Dell interoperability) dell.com
Equivalent models from other brands
FAQ
Can the PowerEdge T640 be converted to a rack server?
Yes, with the optional 5U rack conversion kit, the T640 can be mounted into standard 19-inch server racks.
How many GPUs does the T640 support?
It supports up to 4 double-wide 300W PCIe GPUs or up to 8 single-wide 75W accelerators with high-wattage power supplies.
Buying or selling T640?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell PowerEdge T640 Technical Guide, checked 2026-10-27