Crucial CT2KIT51272AF80E | 8GB Kit (2 X 4GB) DDR2-800MHz PC2-6400 ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory

Technical Specs:
- Capacity: 8GB (2 x 4GB)
- Memory Type: DDR2 SDRAM
- Memory Speed: 800 MHz (PC2-6400)
- Latency Timings: CL5
- Error Correction Code (ECC): ECC
- Buffered/Unbuffered: Fully Buffered
- Form Factor: DIMM 240-pin
- Rank: Dual Rank

Helpful Notes:
1. ECC memory is designed for servers and workstations to detect and correct errors in data.
2. Fully buffered memory has an additional buffer chip to improve stability and reduce electrical load on the memory controller.
3. DDR2-800MHz is a relatively slow memory speed by today's standards, but may still be useful for older systems.