4GB (2X 2GB) DDR2 PC2-6300 PC2-6400 800Mhz 240 Pin DIMM (Desktop Memory) 4 GB KIT (Price Include Tax) at Amazon.com
DDR2 2x2GB (4GB Kit) 800MHz UDIMM RAM (PC2-6400) CL6 240Pin 1.8V Non-ECC Unbuffered Compatible All Motherboards Desktop Memory at Amazon.com
2GB PC2-6400 (800Mhz) 240 pin DDR2 DIMM (CCK) at Amazon.com
Amazon.com: High Performance Memory Module for RAM for Intel/AMD (2GB, DDR2,800MHz, 200PIN, PC-6400), Compatible with Your Digital Smart Computer/Computer : Electronics