It plays great then starts to lag for a minute or so, stops then starts to do it again after 15 minutes of playing? Anyone know how to fix this problem? Are anyothers haveing this problem?
This sounds like a classic case of thermal throtting. Either your CPU or your GPU are getting so hot that they start taking naps. Setting a FPS limit, lowering graphics settings, cleaning dust out of your case, and/or removing any overclocking may solve it.