 "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 Original 500670-B21 CNJ 2GB 240P PC3-10600 CL9 18c 128x8 DDR3-1333 1.5V ECC UDIMM Retail"
 "500670-B21 CNJ 2GB 240P PC3-10600 CL9 18c 128x8 DDR3-1333 1.5V ECC UDIMM Retail"