Dell 311-5204 | 1GB Kit (4 X 256MB) DDR2-667MHz PC2-5300 ECC Unbuffered CL5 240-Pin DIMM Single Rank Memory

Technical specs:
- Capacity: 1GB (4 x 256MB)
- Technology: DDR2 SDRAM
- Speed: 667MHz (PC2-5300)
- CAS Latency: CL5
- Error Correction Code (ECC): ECC
- Buffered/Unbuffered: Unbuffered
- Form Factor: DIMM 240-pin
- Rank: Single rank

Helpful notes:
1. This memory kit is suitable for servers and workstations that require ECC memory.
2. DDR2-667MHz is a relatively slow speed by today's standards, so it may not be suitable for high-performance applications.
3. Make sure your system supports unbuffered memory before purchasing this kit.