1GB DDR2 PC2-4200 200 pin 533MHz SO-DIMM RAM Notebook Memory for Dell Latitude D410, D420, D430, D510, D520, D610, D620, D810, D820 (PARTS QUICK BRAND) Capacity: 1GB Form Factor: 200 pin SO-DIMM Warranty: Lifetime Speed: 533MHz PC2-4200