Kingston ValueRAM 4GB Kit (2x2GB) DDR2 667MHz FBDIMM Fully Buffered Server Memory KVR667D2D8F5K2/4G at Amazon.com
CMS 2GB (2X1GB) DDR2 5300 667MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge 860 Ddr2 EccNR for Server Only - B70 at Amazon.com
Kingston ValueRAM 2GB 667MHz DDR2 ECC CL5 DIMM (Kit of 2) Desktop Memory at Amazon.com