Dell Latitude D630 RAM (Slot A) Replacement - iFixit Repair Guide
4GB Kit (2GB X 2) Memory Upgrade for Dell Latitude D630 / D630c DDR2 PC2-6400 800MHz 200 pin SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
8GB 2X4GB Memory RAM for Dell Latitude D630 XFR DDR2 SO-DIMM 200pin PC2-6400 800MHz Black Diamond Memory Module Upgrade System Specific Memory - Newegg.com