| Manufacturer Part Number | 398708-061 |
| Manufacturer Part Option | 397415-B21 |
| Brand | HP |
| Type | DDR2 SDRAM |
| Capacity | 4 GB |
| Form Factor | RDIMM |
| Memory Features | Registered ECC |
| Bus Speed | PC2-5300 |
| Memory Speed | 667MHz |
| Number of Pins | 240 pin |
| Latency | CAS 5-5-5 |
| Voltage | 1.8 V |