I've recently updated my PC's graphics card to a GTX 560 Ti, hoping to get a better performance in the games I play. It will run pretty well for hours, but will suddenly die down and all the games I play will lag. I have no clue how to fix this, but i have heard somewhere about bottlenecking, and I have a feeling this might be the case, because I haven't got the best processor, it is an AMD Athlon II X2 220 @2.8ghz. A quick response would be great! Thanks.