I am planning on purchasing 2 sets of G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL8D-8GBXM, for a total of 16GB. This will be on an Asus Z77 board with either the new i5 ivy bridge or i5 sandy bridge. I wanted to know if running 4 modules at 16GB will maintain 1600 speed or if it will drop. And if it does drop can I raise it back up in the bios? Thanks.