Me too...ATI & overheating! Before I left my desk today I tried to put my machine in sleep mode...the screen went off but obviously everything else stayed awake (i've had this happen a few times while on ac power). When I came back a couple of hours later my machine was burning up....Speedfan showed the temp at 79 celsius. After blowing into the exhaust vent to get the fan going it cooled back down to 36 within just a few minutes. This thing is starting to scare me it gets so hot. I'll be calling Gateway on Monday.