Crucial 32GB Kit (16GBx2) DDR3/DDR3L-1600 MT/s (PC3-12800) DR x4 RDIMM Server Memory CT2K16G3ERSLD4160B / CT2C16G3ERSLD4160B 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