 "647909-B21 HP 8GB (1x8GB) Dual Rank LP UDIMM", "Null" "New 647909-B21 UDIMM Wholesale Price 647909-B21"
"Description:HP 8GB (1x8GB) Dual Rank x8 PC3L-10600E(DDR3-1333) Unbuffered CAS-9 Low Voltage Memory KitPart Number(s)
Option Part# 647909-B21
Spare Part# 664696-001
Assembly Part# 647658-081" 
 "HP Low Power kit memory - 4 GB DIMM 240-pin DDR3" " HP DDR3 500660-B21 Server Memory CDWG.com
"HP 4GB (1x4GB) Quad Rank x8 PC3-8500 (DDR3-1066) Registered CAS-7 Low Power Memory Kit" 