32GB (2x16GB) DDR3-1600MHz PC3-12800 ECC RDIMM 2Rx4 1.35V Registered Server Memory by NEMIX RAM at Amazon.com
Amazon.com: V-Color DDR3 32GB (16GBx2) 1600MHz ECC RDIMM Server Memory Using Hynix Original IC 1Gx4 2Rx4 1.35V REG Registered DIMM Memory for Server (TR316G16D411LK) : Everything Else