My pc has worked great and all of a sudden it has randomly started crashing any where from 10 mins- several hours of gaming. Usually there will be a weird noise for a few seconds then theres no signal from the monitor, but pc is still on in hibernate or sleep it seams. But i cant do anything to get back into game or even turn the pc off...i have to flip the switch in back. Sometimes there will be sound from the game, but usually not. My gpu idles at 44c and during gaming is no higher then 55c, my cpu is mid 40c, motherboard is 40c and ram passes the "touch test". I have also just cleaned the whole thing out from dust. I even used my room fan to help keep it cool. so i believe overheating is not the issue. I honestly dont know what else to try. i have the latest drivers for my nvidia gtx 260. I also have a 1,000 watt power supply so it isnt underpowered. Other specs are 6 g of ram and an amd quad core. Please help in pointing me in the right direction. Thanks.