Ok, currently I have a 4GB Corsair XMS3 1333MHz RAM running but I want to upgrade to something more efficient and fast. Maybe something like this: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231289&cm_re=trident-_-20-231-289-_-Product with a 2133MHz Speed memory. I was wondering if they are compatible with the mtoherboard since the specifications say 2133(OC) - I know it means OC Profile but what does it exactly mean at a functional level, I mean, will they run perfectly at 2133 from the start or does the (OC) means I have to tweak something out? Also, if you know of a better RAM package suitable for my extreme gaming means, please do advice since Im about to purchase that GSkill package and I welcome advice and suggestions on othr memories and brands. Thanks in advance for any answers!!