2GB FULLY BUFFERED DDR2 PC2-5300 667MHz ECC (FB-DIMM) Memory Not for MacPro at Amazon.com
Micron 1GB DDR2 ECC 400 CL3 Reg 1Rx4 Server Memory at Amazon.com
Nanya 1GB DDR2 RAM PC2-5300 200-Pin Laptop SODIMM at Amazon.com
4AllDeals 1GB Memory RAM Upgrade for The Dell OptiPlex GX620 Desktop, Mini Tower, Small Form Factor and Ultra Small Form Factor (DDR2-400, PC2-3200) at Amazon.com