Dell A11545455 | 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
- Memory Size: 512 MB
- Memory Speed: 667 MHz
- Memory Standard: PC2-5300
- Error Checking: Non-ECC
- Signal Processing: Unbuffered
- CAS Latency: CL5
- Form Factor: 200-pin SoDimm
- Rank: Dual Rank

Helpful notes:
- This memory module is compatible with the Dell Latitude D420 laptop.
- DDR2-667MHz is a relatively slow memory speed, but it can still improve system performance compared to lower speeds.
- Dual rank memory modules can provide better performance in certain applications, but may not be compatible with all systems.