I currently have an intel core 2 duo @1.8ghz and 2GB of ddr2-667 ram and intel ingrated graphics. It laagggss very horribly in L4D2, COD and Combat Arms. (Approximately 2fps) Even my pentium 4 system can play smoothly. I want to upgrade the video card, as I think it is causing all the problems. Which video card should I choose, without getting bottlenecked too badly by the processor. I was thinking about an HD 5670, so will it bottleneck my computer alot?