Dataram DRSX6440/4GB | 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory

Here are the technical specs for DRSX6440/4GB:

- Memory Type: DDR2 SDRAM
- Capacity: 4GB (2 x 2GB)
- Speed: 667MHz (PC2-5300)
- Error Correction Code (ECC): Yes
- Buffered/Registered: Fully Buffered
- CAS Latency: CL5
- Pin Count: 240-Pin DIMM
- Rank: Dual Rank

Helpful notes:
1. This memory kit is designed for use in servers and workstations that require ECC memory.
2. Fully buffered memory provides better reliability and performance than unbuffered memory.
3. Make sure to check your motherboard's compatibility with DDR2 memory before purchasing.