- CPU sockets
- 2 × LGA3647
- CPUs
- 1st and 2nd-gen Xeon Scalable (Silver, Gold, Platinum)
- Memory
- DDR4 RDIMM or LRDIMM, up to 2933 MT/s with 2nd-gen CPUs
- Memory slots
- 24 (12 per CPU)
- Max memory
- 3 TB (24 × 128 GB LRDIMM)
- Drive bays
- 4 × 3.5in, 8 × 2.5in or 10 × 2.5in
- RAID / HBA
- PERC H330, H730P, H740P Mini or HBA330; BOSS-S1 for boot
- Power supplies
- 495W to 1600W hot-swap
- Management
- iDRAC9
- CMOS battery
- CR2032 coin cell
- The 1U rack server itself
- from $272 on eBay (127 listings)
Dell PowerEdge R640 CPUs
| Item | Fits because | Lowest now | $/core | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|---|
 Intel Xeon Silver 4110 deal | 1st-gen Xeon Scalable, LGA3647 | $8.54 | $1.07 | $27.53 | ▼ 17.8% | 93 | |
 Intel Xeon Gold 5118 | 1st-gen Xeon Scalable, LGA3647 | $8.99 | $0.75 | $22.00 | 0% | 59 | |
 Intel Xeon Silver 4116 | 1st-gen Xeon Scalable, LGA3647 | $9.00 | $0.75 | $22.00 | ▼ 6.3% | 61 | |
 Intel Xeon Silver 4114 | 1st-gen Xeon Scalable, LGA3647 | $9.99 | $1.00 | $27.24 | ▼ 2.7% | 80 | |
 Intel Xeon Gold 6142 | 1st-gen Xeon Scalable, LGA3647 | $11.54 | $0.72 | $29.33 | 0% | 51 | |
 Intel Xeon Gold 6130 | 1st-gen Xeon Scalable, LGA3647 | $11.89 | $0.74 | $37.59 | ▼ 3.6% | 56 | |
 Intel Xeon Gold 6140 | 1st-gen Xeon Scalable, LGA3647 | $14.99 | $0.83 | $35.00 | ▲ 1.0% | 61 | |
 Intel Xeon Gold 6132 | 1st-gen Xeon Scalable, LGA3647 | $15.71 | $1.12 | $34.22 | 0% | 41 | |
 Intel Xeon Silver 4214 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $15.98 | $1.33 | $39.59 | ▼ 1.0% | 51 | |
 Intel Xeon Silver 4210 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $20.00 | $2.00 | $59.97 | ▼ 13.0% | 91 | |
 Intel Xeon Gold 5218 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $21.99 | $1.37 | $83.81 | ▼ 15.8% | 60 | |
 Intel Xeon Gold 6152 | 1st-gen Xeon Scalable, LGA3647 | $22.79 | $1.04 | $59.99 | 0% | 36 | |
 Intel Xeon Silver 4214R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $23.75 | $1.98 | $78.99 | ▲ 12.9% | 61 | |
 Xeon Gold 6148 | 1st-gen Xeon Scalable, LGA3647 | $26.99 | $1.35 | $56.99 | 0% | 49 | |
 Xeon Gold 6138 | 1st-gen Xeon Scalable, LGA3647 | $27.20 | $1.36 | $429 | ▼ 0.8% | 55 | |
 Intel Xeon Gold 6230 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $27.99 | $1.40 | $63.49 | ▲ 5.8% | 52 | |
 Intel Xeon Gold 6154 | 1st-gen Xeon Scalable, LGA3647 | $28.95 | $1.61 | $59.28 | ▲ 1.1% | 48 | |
 Intel Xeon Gold 5220 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $31.99 | $1.78 | $93.11 | ▲ 3.8% | 48 | |
 Intel Xeon Platinum 8160 deal | 1st-gen Xeon Scalable, LGA3647 | $33.99 | $1.42 | $62.67 | ▲ 3.4% | 42 | |
 Intel Xeon Gold 5220R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $39.50 | $1.65 | $88.75 | ▼ 4.5% | 68 | |
 Intel Xeon Platinum 8168 deal | 1st-gen Xeon Scalable, LGA3647 | $49.95 | $2.08 | $78.30 | ▲ 0.9% | 32 | |
 Intel Xeon Gold 6252 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $56.00 | $2.33 | $79.99 | ▲ 0.6% | 35 | |
 Intel Xeon Gold 6254 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $74.70 | $4.15 | $125 | 0% | 60 | |
 Intel Xeon Gold 6248 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $84.69 | $4.23 | $119 | ▲ 16.4% | 32 | |
 Intel Xeon Platinum 8260 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $106 | $4.43 | $141 | ▼ 4.3% | 34 | |
 Intel Xeon Gold 6230R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $115 | $4.42 | $229 | 0% | 33 | |
 Intel Xeon Platinum 8268 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $115 | $4.79 | $164 | ▼ 5.7% | 32 | |
 Intel Xeon Platinum 8180 | 1st-gen Xeon Scalable, LGA3647 | $140 | $5.00 | $207 | ▲ 1.2% | 36 | |
 Intel Xeon Platinum 8176 | 1st-gen Xeon Scalable, LGA3647 | $143 | $5.11 | $300 | ▲ 33.3% | 11 | |
 Intel Xeon Gold 5120 | 1st-gen Xeon Scalable, LGA3647 | $145 | $10.36 | $405 | ▲ 4.7% | 38 | |
 Intel Xeon Silver 4210R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $149 | $14.87 | $364 | 0% | 27 | |
 Intel Xeon Gold 6238R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $236 | $8.43 | $379 | ▼ 5.2% | 17 | |
 Intel Xeon Platinum 8280 | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $319 | $11.39 | $440 | ▲ 2.4% | 21 | |
 Intel Xeon Gold 6248R | 2nd-gen Xeon Scalable, LGA3647: update the BIOS first | $320 | $13.33 | $490 | ▲ 5.1% | 29 |
Dell PowerEdge R640 memory
| Item | Fits because | Lowest now | $/GB | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|---|
 DDR4 16GB RDIMM 2400 ECC | DDR4 registered ECC; faster modules run at the board's top speed | $63.39 | $3.96 | $121 | 0% | 116 | |
 DDR4 32GB RDIMM 3200 ECC deal | DDR4 registered ECC; faster modules run at the board's top speed | $149 | $4.66 | $369 | ▼ 2.3% | 120 | |
 DDR4 64GB RDIMM 2933 ECC | DDR4 registered ECC; faster modules run at the board's top speed | $322 | $5.03 | $541 | ▲ 5.8% | 65 | |
 DDR4 64GB RDIMM 3200 ECC | DDR4 registered ECC; faster modules run at the board's top speed | $450 | $7.03 | $757 | 0% | 104 |
Cost to fill all 24 slots
- DDR4 16GB RDIMM 2400 ECC: 24 × $63.39 = $1,521 for 384 GB
- DDR4 32GB RDIMM 3200 ECC: 24 × $149 = $3,576 for 768 GB
- DDR4 64GB RDIMM 2933 ECC: 24 × $322 = $7,719 for 1536 GB
- DDR4 64GB RDIMM 3200 ECC: 24 × $450 = $10,800 for 1536 GB
Dell PowerEdge R640 drives
| Item | Fits because | Lowest now | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|
 600GB 10K SAS 2.5in drive | 2.5in SAS: needs a tray; behind the RAID card or HBA | $7.99 | $18.73 | — | 157 | |
 900GB 10K SAS 2.5in drive | 2.5in SAS: needs a tray; behind the RAID card or HBA | $10.99 | $23.74 | — | 154 | |
 1.2TB 10K SAS 2.5in drive | 2.5in SAS: needs a tray; behind the RAID card or HBA | $17.50 | $34.95 | — | 180 | |
 1.8TB 10K SAS 2.5in drive | 2.5in SAS: needs a tray; behind the RAID card or HBA | $29.99 | $74.96 | — | 169 | |
 Samsung 870 EVO 0.5TB | 2.5in SATA SSD | $69.00 | $156 | ▲ 57.4% | 49 | |
 Crucial MX500 1TB | 2.5in SATA SSD | $89.99 | $176 | ▲ 11.4% | 37 | |
 Samsung 870 EVO 1TB | 2.5in SATA SSD | $120 | $256 | ▲ 6.7% | 134 | |
 Crucial MX500 2TB | 2.5in SATA SSD | $165 | $256 | ▼ 3.5% | 9 | |
 Samsung 870 EVO 2TB | 2.5in SATA SSD | $175 | $366 | 0% | 137 | |
 Intel P4510 1TB | U.2 NVMe: only in configs with an NVMe backplane | $208 | $306 | ▲ 2.1% | 7 | |
 Samsung PM983 1.92TB | U.2 NVMe: only in configs with an NVMe backplane | $295 | $400 | ▲ 0.5% | 21 | |
 2.4TB 10K SAS 2.5in drive | 2.5in SAS: needs a tray; behind the RAID card or HBA | $325 | $649 | — | 169 | |
 Intel P4510 2TB | U.2 NVMe: only in configs with an NVMe backplane | $345 | $550 | ▲ 17.0% | 11 | |
 Samsung 870 EVO 4TB | 2.5in SATA SSD | $369 | $890 | 0% | 69 | |
 Samsung PM983 3.84TB | U.2 NVMe: only in configs with an NVMe backplane | $449 | $899 | ▲ 13.9% | 17 | |
 Intel P4510 4TB deal | U.2 NVMe: only in configs with an NVMe backplane | $499 | $875 | ▲ 2.9% | 16 | |
 Crucial MX500 4TB few listings | 2.5in SATA SSD | $707 | $747 | ▼ 5.1% | 3 | |
 Intel P4510 8TB | U.2 NVMe: only in configs with an NVMe backplane | $1,507 | $1,850 | ▼ 7.5% | 9 |
Dell PowerEdge R640 storage controllers & batteries
| Item | Fits because | Lowest now | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|
 Dell PERC H330 Mini Mono | Factory RAID option: no cache | $9.90 | $24.99 | — | 114 | |
 Dell BOSS-S1 M.2 boot card | Mirrored M.2 boot drives off the front bays | $16.82 | $39.99 | — | 166 | |
 Dell HBA330 Mini | Factory HBA: passes disks straight through (ZFS) | $19.00 | $44.99 | ▼ 30.9% | 27 | |
 Dell PERC H730P Mini | Factory RAID option: 2 GB cache | $24.99 | $64.00 | ▲ 11.3% | 105 | |
 Dell PERC H740P Mini | Factory RAID option: 8 GB cache | $53.99 | $138 | — | 64 |
Dell PowerEdge R640 power supplies
| Item | Fits because | Lowest now | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|
 Dell R640/R740 750W PSU | Hot-swap PSU | $16.95 | $39.97 | — | 100 | |
 Dell R640/R740 1100W PSU | Hot-swap PSU; GPU configs need more | $1,285 | $2,528 | — | 126 |
Dell PowerEdge R640 network cards
| Item | Fits because | Lowest now | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|
 Intel X520-DA2 10GbE SFP+ | Standard PCIe card; order the bracket height your riser takes | $11.99 | $25.00 | 0% | 125 | |
 Intel X540-T2 (10GBase-T) | Standard PCIe card; order the bracket height your riser takes | $21.95 | $48.97 | ▲ 54.6% | 102 | |
 Mellanox ConnectX-3 MCX311A (10GbE) | Standard PCIe card; order the bracket height your riser takes | $22.99 | $37.10 | 0% | 19 | |
 Intel X710-DA2 10GbE SFP+ (2-port) | Standard PCIe card; order the bracket height your riser takes | $27.99 | $51.89 | ▼ 8.1% | 128 | |
 Intel I350-T4 1GbE (4-port) | Standard PCIe card; order the bracket height your riser takes | $32.99 | $85.00 | ▼ 4.4% | 143 | |
 Mellanox ConnectX-4 Lx 25GbE (MCX4121A-ACAT) deal | Standard PCIe card; order the bracket height your riser takes | $34.95 | $79.90 | 0% | 57 |
Dell PowerEdge R640 trays & other parts
| Item | Fits because | Lowest now | Typical | Trend | 7-day | Listings |
|---|---|---|---|---|---|---|
 Dell 14G 2.5in drive tray (R640/R740) few listings | Tray for 2.5in bays | $6.98 | $6.98 | — | 1 |
What to check before you buy
- Dell PowerEdge R640 is a 1U rack server, Dell 14th generation (2017). Parts listed here match its socket, memory type, bays and controller family; the table says why each one fits.
- Prices are the cheapest clean listing (lots, parts-only and bundles are filtered out); how we price. Rows marked "few listings" have fewer than 5 listings today.