Dell PowerEdge R940 Specifications
| Specification | Details |
|---|---|
| Form Factor | 3U Rack (four-socket) |
| Processors | Up to 4x Intel Xeon Scalable (up to 28 cores each) |
| Max Cores | 112 total (4x 28) |
| Memory Slots | 48x DDR4 RDIMM/LRDIMM (12 per CPU) |
| Max Memory | 6 TB (up to 2666 MT/s) |
| NVDIMM Support | Up to 12 NVDIMMs, 192 GB max |
| Drive Bays | Up to 24x 2.5" SAS/SATA (up to 12 NVMe PCIe) |
| Max Storage | 122 TB |
| RAID Controllers | S140 (SW), H330, H740P, H840 (external) |
| BOSS Card | M.2 SATA RAID1 boot |
| PCIe Slots | Up to 13x PCIe Gen 3 (most of any 14G) |
| Management | iDRAC9, Quick Sync 2 |
| Power Supply | 1100W/1600W/2000W/2400W Platinum, 1100W Gold DC |
| Chassis Depth | 777 mm |
Dell R940 vs R840 — 3U vs 2U Four-Socket
| Feature | R940 (3U) | R840 (2U) |
|---|---|---|
| Form Factor | 3U | 2U |
| PCIe Slots | Up to 13 | Limited |
| Max Front Drives | 24x 2.5" | 24x 2.5" |
| NVMe Direct-Attach | Up to 12 | Up to 24 |
| Rack Density | 14 per 42U | 21 per 42U |
| Chassis Depth | 777 mm | 812 mm |
Choose the R940 when maximum PCIe expansion (13 slots) is the priority — mission-critical databases with multiple HBAs, NICs, and accelerator cards. Choose the R840 for maximum NVMe density (24 direct-attach) in a denser 2U form factor.
Frequently Asked Questions
How many PCIe slots does the Dell R940 have?
Up to 13 PCIe Gen 3 slots — the most of any 14th Generation Dell PowerEdge server. This makes the R940 the platform of choice for workloads requiring extensive add-in card expansion.
What is the difference between the Dell R940 and R840?
Both are four-socket servers with 112 max cores and 6 TB RAM. The R940 is 3U with 13 PCIe slots but up to 12 NVMe direct-attach. The R840 is 2U with up to 24 NVMe direct-attach but fewer PCIe slots. Choose R940 for PCIe expansion, R840 for NVMe density and rack efficiency.
What generation is the Dell R940?
The Dell PowerEdge R940 is a 14th Generation (14G) four-socket 3U server using Intel Xeon Scalable processors.
How much does a refurbished Dell R940 cost?
Pricing depends on processor count, memory capacity, storage, and PCIe card requirements. Use the configurator on this page to request a quote. Enterasource builds every R940 to order with a 2-year warranty and free ground shipping to the lower 48 states.
Browse all Dell PowerEdge servers available at Enterasource.
