A-Tech 8GB Replacement for HP 669324-B21 - DDR3 1600MHz PC3-12800 ECC Unbuffered UDIMM 2rx8 1.5v - Single Server Memory Ram Stick (669324-B21-ATC) at Amazon.com
MemoryMasters 8GB DDR3 Memory Upgrade for HP ProLiant MicroServer Gen8 G1610T PC3-12800E ECC Unbuffered DIMM 240 pin 1600MHz RAM at Amazon.com
8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP EliteBook 8540p (WH251UT#ABA) at Amazon.com
HP 16GB PC3-12800 DDR3-1600 2Rx4 1.5v ECC Registered RDIMM (HP PN# 672612-081) at Amazon.com