Dell PowerEdge T640 upgrades
Dual-socket tower: 24 DIMM slots need both CPUs, and PCIe slots 4-8 also need CPU2. Drive bay count and backplane are factory-set, so check the configuration of a used unit before buying.
- DDR4 RDIMM/LRDIMM slots (12 per CPU): 24 × DDR4 DIMM · up to 3.072 TB total · 2933 MT/s · registered (RDIMM) · ECC
- Front drive bays (3.5" or 2.5" SAS/SATA): 18 × HDD / SSD 3.5" / 2.5" (SATA / SAS)
- NVMe 2.5" bays (16 x 2.5" + 8 NVMe config): 8 × SSD 2.5" (NVMe)
- BOSS card M.2 boot SSD slots: 2 × SSD M.2 2280 / M.2 22110 (SATA / NVMe)
- IDSDM/vFlash microSD module: Flash card microSD (SD (UHS)) · up to 64 GB
DDR4 RDIMM/LRDIMM slots (12 per CPU) 24 × DDR4 DIMM · up to 3.072 TB total · 2933 MT/s · registered (RDIMM) · ECC
Registered ECC only; no UDIMMs. RDIMM max 64 GB, LRDIMM 128 GB; don't mix RDIMM and LRDIMM. 2933 MT/s needs 2nd-gen Xeon Scalable with 1 DIMM per channel; 2666 MT/s with 2 per channel or 1st-gen CPUs. CPU2's 12 slots likely need a second CPU installed. Up to 12 NVDIMM-N (16 GB) supported.
| $/GB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $4.38 | $70.00 | 16 GB | Micron 16GB DDR4-2666 ECC RDIMM DDR4-2666 CL19 DIMM RDIMM ECC | Used | eBay US +2 | View deal |
| $6.62 | $105.97 | 16 GB | Micron 16GB DDR4-2666 ECC RDIMM DDR4-2666 CL19 DIMM RDIMM ECC | New | eBay US +2 | View deal |
| $7.03 | $224.95 | 32 GB | Samsung 32GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | Used | eBay US +2 | View deal |
| $7.03 | $449.95 | 64 GB | Samsung 64GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | Used | eBay US +2 | View deal |
| $7.50 | $239.94 | 32 GB | Samsung 32GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | Refurbished | eBay US +1 | View deal |
| $7.81 | $499.94 | 64 GB | Samsung 64GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | Refurbished | eBay US | View deal |
| $8.59 | $137.50 | 16 GB | Micron 16GB DDR4-2666 ECC RDIMM DDR4-2666 CL19 DIMM RDIMM ECC | Refurbished | eBay US +2 | View deal |
| $8.72 | $278.95 | 32 GB | Samsung 32GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | New | eBay US +2 | View deal |
| $10.16 | $649.95 | 64 GB | Samsung 64GB DDR4-2933 ECC RDIMM DDR4-2933 CL21 DIMM RDIMM ECC | New | eBay US +2 | View deal |
Front drive bays (3.5" or 2.5" SAS/SATA) 18 × HDD / SSD 3.5" / 2.5" (SATA / SAS)
Bay count is factory-set: 8 or 18 x 3.5", 16 or 32 x 2.5", or 8 x 2.5" in 3.5" carriers. Backplane is chosen at purchase and probably isn't easily swapped. 2.5" drives in 3.5" bays need carriers. Check the unit's configuration.
| $/TB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $7.50 | $59.99 | 8 TB | Seagate BarraCuda 8TB 3.5" HDD 3.5" HDD · SATA · 5400 rpm · SMR | Used | eBay US +2 | View deal |
| $19.73 | $315.68 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US +2 | View deal |
| $28.12 | $224.99 | 8 TB | Seagate IronWolf 8TB 3.5" NAS HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US +2 | View deal |
| $31.19 | $499.00 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | Refurbished | eBay US +1 | View deal |
| $31.25 | $500.00 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | New | eBay US +2 | View deal |
| $31.49 | $125.95 | 4 TB | Seagate IronWolf 4TB 3.5" NAS HDD 3.5" HDD · SATA · 5400 rpm | Used | eBay US +2 | View deal |
| $31.67 | $380.00 | 12 TB | Toshiba N300 12TB 3.5" NAS HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US | View deal |
| $34.03 | $40.84 | 1.2 TB | Seagate Exos 10E2400 1.2TB 2.5" SAS 10K HDD 2.5" HDD · SAS · 10000 rpm · 15 mm | Used | eBay US +2 | View deal |
| $34.94 | $559.00 | 16 TB | WD Ultrastar DC HC550 16TB 3.5" SAS HDD 3.5" HDD · SAS · 7200 rpm | Refurbished | eBay US | View deal |
| $35.62 | $285.00 | 8 TB | WD Red Plus 8TB 3.5" NAS HDD 3.5" HDD · SATA · 5640 rpm | New | eBay US +2 | View deal |
NVMe 2.5" bays (16 x 2.5" + 8 NVMe config) 8 × SSD 2.5" (NVMe)
Only on the factory 16 x 2.5" chassis with 8 NVMe bays. Dell lists NVMe SSDs of 800 GB to 6.4 TB. HHHL PM1725 NVMe add-in card kits are also offered.
No compatible offers right now.
BOSS card M.2 boot SSD slots 2 × SSD M.2 2280 / M.2 22110 (SATA / NVMe)
Optional rear BOSS PCIe card with hardware RAID; not hot-plug. Dell lists 120 GB and 240 GB drives. Sources say M.2 SATA or PCIe x1 but don't confirm NVMe. No M.2 on the motherboard. Confirm the card is fitted.
| $/TB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $75.00 | $299.99 | 4 TB | Crucial P3 Plus 4TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal |
| $107.50 | $215.00 | 2 TB | Crucial P3 Plus 2TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal |
| $119.50 | $239.00 | 2 TB | Crucial P3 Plus 2TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | New | eBay US +2 | View deal |
| $119.50 | $239.00 | 2 TB | Crucial P3 Plus 2TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Refurbished | eBay US +1 | View deal |
| $120.00 | $120.00 | 1 TB | Crucial P3 1TB M.2 2280 NVMe (Gen3) M.2 2280 SSD · NVMe Gen3 | Used | eBay US +1 | View deal |
| $125.00 | $499.99 | 4 TB | Samsung 990 PRO 4TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal |
| $127.99 | $127.99 | 1 TB | Kingston NV3 1TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | Used | eBay US +2 | View deal |
| $129.99 | $129.99 | 1 TB | Crucial P3 1TB M.2 2280 NVMe (Gen3) M.2 2280 SSD · NVMe Gen3 | New | eBay US +2 | View deal |
| $135.00 | $540.00 | 4 TB | WD_BLACK SN850X 4TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen4 | New | eBay US +2 | View deal |
| $148.00 | $148.00 | 1 TB | Samsung 970 EVO Plus 1TB M.2 2280 NVMe M.2 2280 SSD · NVMe Gen3 | Used | eBay US +2 | View deal |
IDSDM/vFlash microSD module Flash card microSD (SD (UHS)) · up to 64 GB
Optional Dell-proprietary rear module (PCIe x1 slot, USB 3.0 interface). IDSDM takes 16, 32 or 64 GB microSD cards; vFlash is 16 GB only. Confirm it is fitted.
No compatible offers right now.