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
IBM EM32 32GB (2 x 16GB) Memory Kit 1066MHz PC3-8500 DDR3 ECC RDIMMs 31F5