16GB 672631-B21 240-Pin DDR3 ECC RDIMM RAM | Memory for HP
Crucial Technology 16GB DDR3-1866 / PC3 14900 RDIMM ECC Server Memory RAM (CT16G3ERSDD4186D) at Amazon.com
HP 672612-081 16GB DDR3 1600MHz 240-Pin Server Memory
HP 16GB PC3-12800 DDR3-1600 2Rx4 1.5v ECC Registered RDIMM (HP PN# 672612-081) at Amazon.com
Amazon.com: OWC 16GB (2 x 8GB) PC8500 DDR3 ECC-R 1066MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve. (OWC85MP3S8M16GK) : Everything Else