CT51272AF667-M36FH0D - Crucial 4GB DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory Module

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

Helpful Notes:
1. This memory module is designed for servers and workstations that require ECC memory.
2. Fully Buffered memory modules are more reliable and offer better performance than unbuffered modules.
3. Make sure to check your motherboard's compatibility with DDR2 memory before purchasing.