Hynix DDR3-8 GB - DIMM 240-pin - 1866 MHz / PC3-14900 - CL13-1.5 V - Registered - ECC at Amazon.com
Axiom AX - DDR3-8 GB - DIMM 240-pin 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