The following tables list compatible memory DIMMs for the Dell PowerEdge R640, grouped by memory capacity. Separating the DIMMs by capacity makes it easier to compare available memory options while retaining the model number, manufacturer, memory type, speed, ECC support, registered status, and rank information from the source dataset.
8GB RAM
| Model Number ⇅ | Brand ⇅ | Capacity ⇅ | Type ⇅ | Speed ⇅ | ECC ⇅ | Registered ⇅ | Rank ⇅ |
|---|---|---|---|---|---|---|---|
| M393A1G40EB1-CPB | Samsung | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx4 |
| HMA41GR7MFR8N-TF | SK hynix | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx8 |
| 9ASF1G72PZ-2G3B1 | Micron | 8GB | RDIMM | 2400 MT/s | Yes | Yes | 1Rx8 |
| HMA41GR7AFR8N-TF | SK hynix | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx8 |
| M393A1G43DB0-CPB | Samsung | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx8 |
| HMA41GR7MFR4N-TF | SK hynix | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx4 |
| HMA41GR7AFR4N-TF | SK hynix | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx4 |
| M393A1G40DB0-CPB | Samsung | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx4 |
| 18ASF1G72PZ-2G1A2 | Micron | 8GB | RDIMM | 2133 MT/s | Yes | Yes | 1Rx8 |
| 9ASF1G72PZ-3G2E2 | Micron | 8GB | RDIMM | 3200 MT/s | Yes | Yes | 1Rx8 |
| M393A1K43BB0-CRC | Samsung | 8GB | RDIMM | 2400 MT/s | Yes | Yes | 1Rx8 |
| M393A1K43BB1-CTD | Samsung | 8GB | RDIMM | 2666 MT/s | Yes | Yes | 1Rx8 |
| HMA81GR7CJR8N-VK | SK hynix | 8GB | RDIMM | 2666 MT/s | Yes | Yes | 1Rx8 |
| HMA81GR7AFR8N-VK | SK hynix | 8GB | RDIMM | 2666 MT/s | Yes | Yes | 1Rx8 |
| 9ASF1G72PZ-2G6D1 | Micron | 8GB | RDIMM | 2666 MT/s | Yes | Yes | 1Rx8 |
16GB RAM
| Model Number ⇅ | Brand ⇅ | Capacity ⇅ | Type ⇅ | Speed ⇅ | ECC ⇅ | Registered ⇅ | Rank ⇅ |
|---|---|---|---|---|---|---|---|
| HMA82GR7CJR8N-WM | SK hynix | 16GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx8 |
| M393A2K43DB2-CTD | Samsung | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7AFR8N-VK | SK hynix | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PDZ-2G6E1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7CJR8N-VK | SK hynix | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PDZ-2G6J1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| M393A2K43BB1-CTD | Samsung | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7DJR8N-XN | SK hynix | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PDZ-3G2E1 | Micron | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7CJR8N-XN | SK hynix | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7AFR8N-UH | SK hynix | 16GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7MFR8N-UH | SK hynix | 16GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx8 |
| M393A2K40CB1-CRC | Samsung | 16GB | RDIMM | 2400 MT/s | Yes | Yes | 1Rx4 |
| HMA82GR7JJR8N-WM | SK hynix | 16GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PZ-2G3B1 | Micron | 16GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PDZ-2G6D1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7AFR4N-VK | SK hynix | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| M393A2K43DB3-CWE | Samsung | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMAG78EXNRA199N | SK hynix | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PDZ-3G2R1 | Micron | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMAG78EXNRA086N | SK hynix | 16GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7DJR4N-WM | SK hynix | 16GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 18ASF2G72PZ-2G6B1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PZ-2G6D1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| 18ASF2G72PZ-2G6E1 | Micron | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7CJR4N-VK | SK hynix | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| M393A2K43CB2-CVF | Samsung | 16GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx8 |
| HMA82GR7JJR8N-VK | SK hynix | 16GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx8 |
| M393A2K40BB1-CRC | Samsung | 16GB | RDIMM | 2400 MT/s | Yes | Yes | 1Rx4 |
| 18ASF2G72PDZ-2G9E1 | Micron | 16GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx8 |
32GB RAM
| Model Number ⇅ | Brand ⇅ | Capacity ⇅ | Type ⇅ | Speed ⇅ | ECC ⇅ | Registered ⇅ | Rank ⇅ |
|---|---|---|---|---|---|---|---|
| M393A4K40CB2-CTD | Samsung | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7CJR4N-VK | SK hynix | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HP24D4R7D4MAM-32 | Kingston | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| KG27000142-001 | Kingston | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| HMAA4GR7AJR8N-XN | SK hynix | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| HMA84GR7AFR4N-VK | SK hynix | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HMAA4GR7CJR8N-XN | SK hynix | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| 36ASF4G72PZ-3G2E7 | Micron | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-3G2R1 | Micron | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| 9965640-008.A01G | Kingston | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| HMAA4GR7CJR4N-XN | SK hynix | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| 18ASF4G72PZ-3G2E1 | Micron | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G9J3 | Micron | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G6E1 | Micron | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| AM32D426R19D4MEX | Kingston | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| M393A4K40BB2-CTD | Samsung | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G6D1 | Micron | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HP24D4R7D4MAI-32 | Kingston | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7CJR4N-WM | SK hynix | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G3B1 | Micron | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7DJR4N-WM | SK hynix | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| M393A4K40BB3-CVF | Samsung | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7DJR4N-XN | SK hynix | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| 9965640-041.C00G | Kingston | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7JJR4N-WM | SK hynix | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G6E1C | Micron | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HP26D4R9D4MEI-32 | Kingston | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G3A1 | Micron | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| M393A4K40DB2-CTD | Samsung | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| HMA84GR7JJR4N-VK | SK hynix | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
| M393A4G43AB3-CWE | Samsung | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx8 |
| M393A4K40DB3-CWE | Samsung | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| M393A4G40AB3-CWE | Samsung | 32GB | RDIMM | 3200 MT/s | Yes | Yes | 1Rx4 |
| 9965640-050.C00G | Kingston | 32GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G3D1 | Micron | 32GB | RDIMM | 2400 MT/s | Yes | Yes | 2Rx4 |
| 36ASF4G72PZ-2G6H1 | Micron | 32GB | RDIMM | 2666 MT/s | Yes | Yes | 2Rx4 |
64GB RAM
| Model Number ⇅ | Brand ⇅ | Capacity ⇅ | Type ⇅ | Speed ⇅ | ECC ⇅ | Registered ⇅ | Rank ⇅ |
|---|---|---|---|---|---|---|---|
| 72ASS8G72LZ-2G9J1 | Micron | 64GB | LRDIMM | 2933 MT/s | Yes | Yes | 4Rx4 |
| HMAA8GR7AJR4N-XN | SK hynix | 64GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| M386A8K40BM2-CTD | Samsung | 64GB | LRDIMM | 2666 MT/s | Yes | Yes | 4Rx4 |
| HMAA8GL7CPR4N-VK | SK hynix | 64GB | LRDIMM | 2666 MT/s | Yes | Yes | 4Rx4 |
| HMAA8GL7AMR4N-VK | SK hynix | 64GB | LRDIMM | 2666 MT/s | Yes | Yes | 4Rx4 |
| HMAA8GR7MJR4N-WM | SK hynix | 64GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| HMAA8GR7AJR4N-WM | SK hynix | 64GB | RDIMM | 2933 MT/s | Yes | Yes | 2Rx4 |
| 72ASS8G72LZ-2G9J2 | Micron | 64GB | LRDIMM | 2933 MT/s | Yes | Yes | 4Rx4 |
| M386A8K40DM2-CVF | Samsung | 64GB | LRDIMM | 2933 MT/s | Yes | Yes | 4Rx4 |
| 72ASS8G72LZ-2G6D2 | Micron | 64GB | LRDIMM | 2666 MT/s | Yes | Yes | 4Rx4 |
| 72ASS8G72PSZ-2S6G1 | Micron | 64GB | RDIMM | 2666 MT/s | Yes | Yes | 2S2Rx4 |
| M386A8K40CM2-CTD | Samsung | 64GB | LRDIMM | 2666 MT/s | Yes | Yes | 4Rx4 |
| 36ASF8G72PZ-3G2E1 | Micron | 64GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| M393A8G40AB2-CWE | Samsung | 64GB | RDIMM | 3200 MT/s | Yes | Yes | 2Rx4 |
| M386A8K40CM2-CVF | Samsung | 64GB | LRDIMM | 2933 MT/s | Yes | Yes | 4Rx4 |
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