SEWX2B1U - Sun 8GB Kit (4 X 2GB) DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM Dual Rank Memory

1. Memory Type: DDR2 SDRAM
2. Memory Size: 8 GB (4 x 2 GB)
3. Memory Speed: 667 MHz (PC2-5300)
4. CAS Latency: CL5
5. Error Checking and Correction (ECC): Yes
6. Registered: Yes
7. Memory Rank: Dual Rank
8. Number of Pins: 240
9. Form Factor: DIMM
10. Voltage: 1.8V
11. Chip Organization: X4
12. Memory Configuration: 512M x 72

Helpful notes:
1. This memory is compatible with Sun Fire X4150, X4250, and X4450 servers.
2. ECC memory is designed to detect and correct single-bit errors, making it more reliable than non-ECC memory.
3. Dual rank memory modules have two sets of memory chips that can be accessed independently, which can improve memory performance in some systems.