Dell A1597689 | 512MB PC2-5300 DDR2-667MHz non-ECC Unbuffered CL5 200-Pin SO-DIMM Dual Rank Memory Module for Latitude D520

Technical Specs:
- Memory Type: DDR2 SDRAM
- Capacity: 512MB
- Speed: 667MHz
- Form Factor: 200-pin SO-DIMM
- CAS Latency: CL5
- Error Correction Code: Non-ECC
- Rank: Dual Rank
- Voltage: 1.8V

Helpful Notes:
- This memory module is compatible only with the Dell Latitude D520 laptop.
- Non-ECC memory is faster and less expensive than ECC memory, but it does not correct errors.
- Dual rank memory provides better performance than single rank memory, but it may not be compatible with some systems.