Amazon.com: Ramjet 8GB (2x4GB) DDR2 800MHz Upgrade Memory Kit - Fully Buffered ECC FB-DIMM for Apple Mac Pro 3,1 : Electronics
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