OFFTEK 8GB Kit (2x4GB Modules) Replacement RAM Memory for HP-Compaq Workstation xw4600 (DDR2-6400 - ECC) Server Memory/Workstation Memory 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
8GB PC2-5300 DDR2-667 ECC Network Server Memory RAM for sale | eBay