HP 16GB PC3-12800 DDR3-1600 2Rx4 1.5v ECC Registered RDIMM (HP PN# 672612-081) at Amazon.com
DIMM DDR3 ECC Registered PC3-12800 1600MHz Dual Rank RAM Memory 16GB KIT (2 x 8GB) For HP-Compaq ProLiant Series at Amazon.com
16GB KIT (2 x 8GB) for HP-Compaq Workstation Series Z620 (ECC Registered) Z820 (ECC Registered). DIMM DDR3 ECC Registered PC3-10600R 1333MHz Single Rank Server Ram Memory. Genuine A-Tech Brand. at Amazon.com
CMS 16GB (4X4GB) DDR3 8500 1066MHZ ECC Non Registered DIMM Memory Ram Compatible with Apple Mac Pro 2.26Ghz 8-Core Xeon MB535Ll/A - B130 at Amazon .com
Crucial Technology 16GB DDR3-1866 / PC3 14900 RDIMM ECC Server Memory RAM (CT16G3ERSDD4186D) at Amazon.com
IBM 16GB ECC 4RX4 VLP DDR3 RDIMM PC3L-8500 1066MHz 1.35V CL7 Memory Module (90Y3221) at Amazon.com
OWC 32GB (2 x 16GB) PC10600 DDR3 ECC-R 1333MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve. at Amazon.com