A-Tech 8GB RAM Replacement for HP 408855-S21 | DDR2 667MHz PC2-5300 2Rx4 1.8V ECC RDIMM Registered 240-Pin DIMM Memory Module at Amazon.com
CMS 8GB (2X4GB) DDR2 5300 667MHZ ECC Fully BUFFERED DIMM Memory Ram Compatible with HP/Compaq Workstation Xw8600 Series Ddr2-Pc5300 Fb for Server Only - B54 at Amazon.com
parts-quick 16GB (2 X 8GB) Memory for Dell PowerEdge 2950 DDR2 FB DIMM at Amazon.com