KVR667D2D4F5/4GEF - Kingston 4GB DDR2-667MHz PC2-5300 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory Module

Technical Specs:
- Memory Size: 4GB
- Memory Technology: DDR2 SDRAM
- Memory Speed: 667 MHz
- Memory Standard: PC2-5300
- Error Checking: ECC
- Signal Processing: Fully Buffered
- CAS Latency: CL5
- Number of Pins: 240-pin
- Rank: Dual Rank
- Form Factor: DIMM
- Operating Voltage: 1.8V
- Memory Configuration: 512M x 72

Helpful Notes:
- ECC memory is designed for servers and workstations that require high reliability and error correction.
- Fully buffered memory has an additional buffer between the memory controller and the memory modules, which improves stability and performance.
- Dual rank memory modules provide better performance than single rank modules, but can be more expensive.