Dell A15345483 | 1GB PC2-6400 DDR2-800MHz non-ECC Unbuffered CL6 200-Pin SO-DIMM Dual Rank Memory Module for Latitude D531

Here are the technical specs:

- Memory Type: DDR2 SDRAM
- Capacity: 1GB
- Speed: PC2-6400 (800MHz)
- Technology: Non-ECC Unbuffered
- Pins: 200-Pin SoDimm
- Rank: Dual Rank
- Compatibility: Latitude D531

Helpful notes:
- This memory module is designed specifically for the Latitude D531 laptop model
- Non-ECC Unbuffered technology means it is not error-correcting, but provides faster performance
- Dual Rank means it has two sets of memory chips, which can improve performance in certain applications