 "HPE - DDR2 8 GB : 2 x 4 DIMM 240-pin" " HPE 240-pin 408854-B21 Server Memory CDW.com
"Boost the capabilities of your HP Workstation and keep it performing reliably with HP memory. Upgrading your memory is a cost-effective way to improve system performance when insufficient memory and hard drive paging is slowing your applications down." 
 "HP 483403-B21 2BWR 4GBx2 240p PC2-5300 CL5 36c 256x4 DDR2-667 2Rx4 ECC RDIMM - Low Power HP 487005-0"
 "483403-B21 2BWR 4GBx2 240p PC2-5300 CL5 36c 256x4 DDR2-667 2Rx4 ECC RDIMM - Low Power HP 487005-061 HP"