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
CMS 24GB (6X4GB) DDR3 10600 1333MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge T710 Ddr3 Ecc Reg for Server Only at Amazon.com
Mac Pro Memory for Model 5.1 | DDR3 1333MHz | 2GB | MacMemory.com
0R1P74 Dell 4GB DDR3 ECC PC3-10600 1333Mhz 2Rx8
OWC 32.0GB (4X 8GB) DDR3 ECC-R PC10600 1333MHz SDRAM ECC Compatible with Mac Pro (OWC1333D3X8M32K) at Amazon.com