TECMIYO DDR2 PC2-6400 DDR2 800 4GB Kit (2x2GB) Non ECC Unbuffered 1.8V CL6 200-Pin Sodimm Laptop Memory Module at Amazon.com
CMS 4GB (2X2GB) DDR2 6400 800MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge 840 Ddr2 Ecc Non Reg for Server Only - B65 at Amazon.com
2GB Memory for HP Pavilion a6700y DDR2 PC2-6400 800MHz DIMM Non-ECC RAM Upgrade (PARTS-QUICK Brand) at Amazon.com
Hynix 2GB DDR2 RAM PC2-6400 240-Pin DIMM Major/3rd at Amazon.com