4GB 2 X 2GB PC2-5300F 667MHz 240 pin DDR2 SDRAM ECC Fully Buffered FB DIMM Server Low Power Memory for HP Workstation XW8600 (PARTS-QUICK BRAND). Equivalent to HP Part Numbers: 397413-B21, 442823-B21,
HYMP564F72CP8D3-Y5 HYNIX 512MB (1X512MB) 1RX8 PC2-5300F MEMORY at Amazon.com
8 GB 4Rx4 PC2-5300F IBM Memory 46C7576 for IBM System x3400, 3500, 3550, 3650 IBM BladeCenter HS21 & HS21 XM at Amazon.com