When I play COD MW3 for a few hours i star getting like this weird lag. Its like a freeze then i unfreeze and it continuously occurs. Is it that the video card is overheating because of playing to much or is something else. I always have a 4 bar connection when this occurs. I have a powercolor 6870. also when this happened i checked my video cards temp and it was like 50 degrees Celsius and my cpu was like 44. Is this a hardware issue or something else?