With your rig, would look at a minimum of 1866/9 or 2133/9...if simply for gaming then can go entry level 1600/0 as DRAM in gaming is nothing more than a conduit for the data stream, the faster DRAM may net you an extra 2-5 FPS....however, if you really use the rig for things like multi-tasking, video/imaging work/rendering, use large data sets, do CAD, run VMs, etc then the faster sticks will really shine.....you don't list a budget or how much you are interested in, but would look at the GSkill Snipers in 1866 or 2133 (CL9) or if budget permits step up to the Gskill Tridents in 1866/8 or 2133/9 either in a 2x4GB set for 8GB total or 2x8GB for 16GB total, those are the best lines of sticks I've found on my Hero (in sig)