My current system consists of an ASUS P6T mobo, 6 GB RAM, i7 930 2.8 GHz processor, Radeon HD 5770 video card, and Win 7 64 bit. I'm able to run any game I throw at it fine at the moment, however, I feel the irrational need for a change. Would upgrading to say a Radeon HD 6870 or even a 7000 series show a noticeable improvement or would my system bottleneck such a card?