Memory Master 4 GB (2 x 2GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Modules MMD4096KD2-800 at Amazon.com
Bewinner 1PCS Memory RAM DDR2 4GB, 4GB Large Capacity DDR2 800Mhz Memory Module,Designed for AMD,Adopting 240Pin to Achieve High Anti-Interference and Antistatic Properties,Plug and Play at Amazon.com
Rasalas PC2-5300 DDR2 667 DDR2 4GB Kit (2x2GB) DDR2 PC2-5300 DDR2 Sodimm PC2-5300S 1.8V CL5 RAM Memory Modules for Intel, MAC, AMD System Notebook Laptop at Amazon.com
parts-quick 8GB (2 X 4GB) Memory for Dell OptiPlex 960 DDR2 800MHz PC2-6400 240 pin Desktop DIMM RAM at Amazon.com