X4262A - Sun 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM Dual Rank Memory

1. Memory Type: DDR2 SDRAM
2. Memory Size: 8 GB (2 x 4 GB)
3. Memory Speed: 667 MHz
4. Latency Timings: CL5
5. Form Factor: DIMM 240-pin
6. Error Correction Code (ECC): ECC Registered
7. Rank: Dual Rank
8. Voltage: 1.8V
9. Number of Modules: 2
10. Compatibility: Sun Fire X4150, X4450, X4450, X4600 M2, X4640, SPARC Enterprise T5120, T5140, T5220, T5240, T5440
11. Data Integrity Check: Advanced ECC
12. Chip Organization: X4

Notes:
1. This memory kit is specifically designed for Sun servers and workstations.
2. ECC Registered memory is more reliable than non-ECC memory as it can detect and correct errors in real-time.
3. Dual Rank memory provides better performance than Single Rank memory as it allows for better interleaving of data between the memory banks.