4570 is plenty fast for most games in the market right now. I have a 4670K, and it never was the bottleneck in any of games that I normally play. the cpu utilisation rate peaks around 60%. Based on the review I have read, a 4570 offer very similar performance to a stock clock 4670K. so you have a solid performer on your hands, and there is no need to worry that the cpu will bottleneck your system.(at least in the next 2 years)