| HP part number | Common part number |
| 1820-1221 | Intel C8008-1 |
| 1820-1480 | Motorola MC6800L |
| 1820-1701 | Intel 8080A (8080A-2) |
| 1820-2074 | Intel P8085AH |
| 1820-2099 | Motorola 6802 |
| 1820-2298 | Zilog Z8400A PS |
| 1820-2624 | Motorola 68B09 |
| 1820-2649 | Zilog Z80B |
| 1820-2737 | Intel 8048 |
| 1820-2378 | AMD AM2910DC |
| 1820-3320 | Motorola MC68000L10 |
| 1821-0859 | 80486DX2-66 (with heatsink) |
| 1821-1168 | 80486DX2-66 (no heatsink) |
| 1821-1285 | 80486DX4-100 |
| 1821-1734 | Pentium 66 MHz |
| 1821-2244 | Pentium 166 MHz |
| 1821-2294 | Pentium 100 MHz |
| 1821-2295 | Pentium 133 MHz |
| 1821-2604 | Pentium 166 MHz |
| 1821-3449 | Intel Pentium Pro 200 MHz (256 KB internal cache) |
| 1821-3450 | Intel Pentium Pro 180 MHz (256 KB internal cache) |
| 1821-3451 | Intel Pentium Pro 166 MHz (512 KB internal cache) |
| 1821-3452 | Intel Pentium Pro 200 MHz (512 KB internal cache) |
| 1821-4608 | Intel Pentium II 350MHz (512 KB level 2 cache) |
