 "Null", "708641-B21 HP 16GB (1x16GB) SDRAM DIMM" "New 708641-B21 DIMM Wholesale Price 708641-B21"
"Description:HP 16GB (1x16GB) Dual Rank x4 PC3-14900R(DDR3-1866) Registered CAS-13 Memory KitPart Number(s)
Option Part# 708641-B21
Spare Part# 715274-001
Assembly Part# 712383-081
HP SmartBuy Part## 708641-S21" 
 "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" 