4GB (2X 2GB) Kit DDR2 PC2-6400 RAM Memory Upgrade for Dell XPS 420 625 630 630i 700 710 720 One 20 One 24 (PARTS-QUICK) - Walmart.com
Zopsc DDR2 4GB RAM 800MHz Memory Module for AMD CPU Stable Fast Data Transmission 240PIN for High Anti-Interference and Antistatic for Desktop Computer, Plug and Play at Amazon.com