Dell PowerEdge T640 Specifications
| Specification | Details |
|---|---|
| Form Factor | Tower or 5U Rackmount (with conversion kit) |
| Processors | Up to 2x Intel Xeon Scalable (up to 28 cores per socket) |
| Max Cores | 56 total |
| Memory Slots | 24x DDR4 RDIMM/LRDIMM |
| Max Memory | 3 TB (up to 2666 MT/s) |
| NVDIMM Support | Up to 12 NVDIMMs, 192 GB max |
| Drive Bays | Up to 18x 3.5" (216 TB) or 32x 2.5" (122 TB) or 16x 2.5" + 8x NVMe |
| RAID Controllers | S140 (SW), H330, H730P, H740P, HBA330, H840 (external) |
| BOSS Card | 2x M.2 SATA (120/240 GB) RAID1 |
| PCIe Slots | Multiple PCIe Gen 3 |
| GPU Support | Internal GPU accelerators |
| Management | iDRAC9 with Lifecycle Controller, Quick Sync 2 |
| Power Supply | 495W/750W/1100W/1600W/2000W/2400W Platinum, 750W Titanium, 1100W 48VDC |
| Chassis Depth | 708.7 mm |
| Cooling | Up to 8 fans (6 hot-plug internal + 2 external) with N+1 redundancy |
The T640 offers more local storage than the R740 rack server: up to 32x 2.5-inch drives (matching the R740xd) or 18x 3.5-inch drives (exceeding any R740 variant). This makes the T640 a viable tower alternative for storage-heavy workloads.
Dell T640 vs R740 — Tower vs Rack
| Feature | T640 (Tower/5U) | R740 (2U Rack) |
|---|---|---|
| Form Factor | Tower or 5U Rack | 2U Rack |
| Processors | Same (Xeon Scalable, up to 28 cores) | Same |
| DIMM Slots / Max RAM | 24 / 3 TB | 24 / 3 TB |
| Max Drives | 18x 3.5" or 32x 2.5" | 8x 3.5" or 16x 2.5" |
| NVMe | Up to 8 | Via PCIe |
| NVDIMM | Up to 12 | Up to 12 |
| GPU | Yes | Up to 3x 300W DW |
| Max PSU | 2400W | 2400W |
| Rack Density | 8 per 42U (5U each) | 21 per 42U |
| Office Use | Yes (quieter) | Requires rack |
| Chassis Depth | 708 mm | 715 mm |
Choose the T640 when you need a tower form factor for office or non-datacenter environments, or when you need more local storage than the R740 can provide. Choose the R740 when rack density matters (2U vs 5U).
Dell T640 vs T440 — Full-Featured vs Entry Tower
| Feature | T640 | T440 |
|---|---|---|
| Max Cores Per CPU | 28 | 14 |
| DIMM Slots | 24 | 16 |
| Max Memory | 3 TB | 1 TB |
| Max Drives | 18x 3.5" or 32x 2.5" | 8x 3.5" or 16x 2.5" |
| NVMe | Up to 8 | None |
| NVDIMM | Up to 12 | None |
| GPU | Yes | None |
| Max PSU | 2400W | 1100W |
Choose the T640 for full Xeon Scalable performance with GPU, NVMe, NVDIMM, and maximum storage. Choose the T440 for budget tower deployments where 14 cores and 1 TB RAM is sufficient.
Frequently Asked Questions
Can the Dell T640 be rackmounted?
Yes. The T640 converts to a 5U rackmount configuration with an optional rack conversion kit. It occupies 5U of rack space, compared to the R740's 2U.
What is the difference between the Dell T640 and R740?
Same processor, memory, and management platform. The T640 is a tower (or 5U rack) with more drive bays (up to 32x 2.5-inch vs 16) and quieter operation for office environments. The R740 is 2U rack with 2.5x better rack density. Choose the T640 for maximum local storage or office deployment. Choose the R740 for datacenter rack density.
What generation is the Dell T640?
The Dell PowerEdge T640 is a 14th Generation (14G) tower server using Intel Xeon Scalable processors. The 13th Gen predecessor is the T630.
How much does a refurbished Dell T640 cost?
Pricing depends on processor, memory, storage, and GPU configuration. Use the configurator on this page to request a quote. Enterasource builds every T640 to order with a 2-year warranty and free ground shipping to the lower 48 states.
Browse all Dell PowerEdge servers available at Enterasource.
