Kinda depends on your resolution as well as what games. I can't see it bottlenecking below 60fps ever so it shouldn't be an issue at all. But yes, in theory you will be able to get a CPU bottleneck - for example my i5 750 bottlenecked my CF 5850s in FurMark running at only 1280x1050 resolution (5 FPS gain over a single 5850) but then running at 1920x1080 the gain was huge (up to 90% more FPS). So yeah, not really anything to worry about but I would still advise at least a small OC. And guessing you're buying 1600mhz RAM, you'll probably be running a 160 base clock which will give you, with turbo, 3.36ghz and up to 3.8ghz. You'll be ok.