32GB (1x32GB) DDR3-1600MHz PC3-12800 ECC LRDIMM 4Rx4 1.35V Load Reduced Server Memory by NEMIX RAM at Amazon.com
G.SKILL Releases The World's Fastest DDR3 32GB (8GBx4) Memory at 3000MHz Extreme Speed Designed for 4th Gen Intel Core Processors and Z87 Motherboards - G.SKILL International Enterprise Co., Ltd.