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,
A-Tech 16GB (4x4GB) ECC RAM for Intel SR Series SR1450 Server | DDR2 800MHz ECC RDIMM PC2-6400 2rx4 Registered DIMM Server Memory Kit at Amazon.com
8GB Kit 2 X 4GB DDR2 Server Memory Upgrade for Dell Precision Workstation 490 SDRAM ECC Fully Buffered FB DIMM PC2-5300 240 pin 667MHz RAM (PARTS-QUICK Brand) at Amazon.com