OWC 32.0GB (4X 8GB) DDR3 ECC-R PC10600 1333MHz SDRAM ECC Compatible with Mac Pro (OWC1333D3X8M32K) 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. (OWC85MP3S9M032K) at Amazon.com
OWC 64.0GB (4X 16GB) PC10600 DDR3 ECC-Registered 1333MHz 240 Pin Memory Upgrade Compatible with Select 2009-2012 Mac Pro Models (OWC1333D3X9M064) at Amazon.com