i have a alienware m18x with sli 470m gx cards and i was wondering...ill turn my laptop on and run games ALLL day long no issues, i go to bed leave it on but shut the screen so it shuts off.when i wake up i load a game it it will be ok for a min then it will freeze and u get like these colored lines like a artifact or something (i cant screenshot it cause when it does it the whole laptop freezes, i have to alt f4) when i close it i restart it and it doesn't do it ...weird cause it does it randomly, i know its not a faulty card/cards cause ive ran tests monitored the voltages and temperatures everything is fine