Dell A1597901 | 512MB PC2-5300 DDR2-667MHz non-ECC Unbuffered CL5 200-Pin SO-DIMM Dual Rank Memory Module for Latitude D420

Here are the technical specifications for the Dell 512MB PC2-5300 DDR2-667MHz Memory Module:

- Memory Type: DDR2 SDRAM
- Capacity: 512MB
- Memory Speed: 667MHz
- Data Integrity Check: Non-ECC
- RAM Features: Unbuffered, Dual Rank
- Form Factor: SO-DIMM 200-pin
- CAS Latency: CL5

Helpful notes:
- This memory module is compatible with Dell Latitude D420 laptops.
- Dual Rank memory modules are faster than Single Rank modules.
- Non-ECC memory is cheaper than ECC memory but does not provide error-checking capabilities.