Not sure why but ever since I installed my new Geforce GTX 650 Ti Boost after about 10 minutes in game the frame rate drops from 40 to 12. this lasts for about 13 seconds then runs smooth again but it always returns a few minutes later with the same FPS drop for the same 13 seconds. I've tried re installing drivers, updating them, everything that comes to mind. During gaming I do notice that my CPU usage spikes all the way to 100% when the lag begins but this NEVER happened with my older Geforce GTX 275 so im very confused as to the problem. Also the CPU temp never goes above 56 C and the GPU never goes above 50C. Can anyone help?!?!?!?!?!?!?!?