A-Tech 64GB Kit (4x16GB) Memory RAM for Asus RS720-E7/RS12-E - DDR3 1333MHz PC3-10600 ECC Registered RDIMM 2Rx4 1.5V - Server at Amazon.com
G.Skill Ripjaws X Series 16 GB (2 x 8 GB) 240-Pin SDRAM (PC3-12800) DDR3 1600 CL10-10-10-30 1.50V Dual Channel Desktop Memory Model F3-12800CL10D-16GBXL at Amazon.com