I have a coolermaster 600w psu. Its about a year old now. Lately i hear this very load noise form the psu when my computer is turned on. However when i play games after a while i feel that the fan is rotating at a much grater speed and the noise level decreases. This is annoying and i wanna know that what is causing the problem. Is my PSU dead or is it safe enough to defend my PC from voltage fluctuation. If not then can it lead to damage of my GPU which was damaged once after a couple of days of this loud noise. PLZ help. If i wanna plan to buy a new PSU for GTX 295 what should i be thn? But i wanna get this fixed.