Welcome back to Tom's Forum!
The Sandy Bridge works best with DDR3-1600 and I'd look at a 4x4GB Kit ;
Maximus IV GENE (LGA 1155). IF your plan is to OC >4.5GHz then DDR3-1866~DDR3-2133, but in general I don't recommend those frequency kits if unfamiliar w/ OC'ing. The gains are minimal.
Therefore, for more trouble free Gaming:
G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 1600 F3-12800CL9Q-16GBXL -
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231429
I read the reviews, in short folks who have no clue how to properly set their RAM.
CORSAIR Vengeance 16GB (4 x 4GB) DDR3 1600 CMZ16GX3M4A1600C9 -
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233143
DDR3-1600 CAS 9-9-9-24-2N @ 1.50v
BIOS:
Easy way:
AI Overclock Tuner -> XMP
Save and Exit = Yes
Manual way / my preference:
AI Overclock Tuner -> Auto
DRAM Frequency -> DDR3-1600MHz
DRAM Timing Control /enter
DRAM CAS# Latency -> 9
DRAM RAS# to CAS# Delay -> 9
DRAM RAS# PRE Time -> 9
DRAM RAS# ACT Time -> 24
-
DRAM Timing Mode -> 2N
-
DRAM Volatge -> 1.50v~1.55v ; often +0.05v helps with 4xDIMM
Save and Exit = Yes