Crucial CT607407 | 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 non-ECC Unbuffered CL5 200-Pin SO-DIMM Memory

Technical Specs:
- Memory Type: DDR2 SDRAM
- Capacity: 4GB Kit (2 x 2GB)
- Speed: 667MHz (PC2-5300)
- Latency: CL5
- Pin Count: 200-Pin SoDimm
- Error Correction Code: Non-ECC
- Buffered/Unbuffered: Unbuffered

Helpful Notes:
1. DDR2-667MHz is a relatively slow memory speed by today's standards, but it may still be useful for older systems.
2. Non-ECC memory is generally less expensive than ECC memory, but it does not provide the same level of data integrity.
3. SoDimm memory is designed for use in laptops and other small form factor devices.