Amazon.com: OWC 32GB (4 x 8GB) PC10600 DDR3 ECC-R 1333MHz DIMMs Memory Compatible with Mac Pro Early 2009 & Late 2010 'Nehalem' & 'Westmere' Systems and Early 2009 Xserve. : Electronics
32GB PC3-10600R DDR3 ECC Server Memory Kit (8 x 4GB) HP 500203-061