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,
IBM 39M5784 1GB 2RX8 ECC PC2-5300F DDR2-667MHz Memory - ServerSupply.com
Hynix 2GB DDR2 Server RAM Memory 5300F – MSU Surplus Store
Dell 4GB 667MHz PC2-5300F Memory (DR397) - Avanti Global Resources
MT18HTF12872FDY-667D6D4 1GB DDR2 667mhz 2RX8 PC2-5300F-555-11-B0 at Amazon .com
Komputerbay 8GB DDR2 SODIMM (200 pin) 800Mhz PC2 6400 / PC2 6300 CL 6.0 - Komputer Bay
HP 4GB PC2-5300F DDR2 ECC FB DIMM Memory 398708-061 at Amazon.com