G.SKILL 4GB (2 x 2GB) 240-Pin SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ at Amazon.com
KOMPUTERBAY 8GB (4X 2GB) DDR2 800MHz PC2-6300 PC2-6400 (240 PIN) DIMM Desktop Memory with Samsung Semiconductors 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