Hi! I bought HIS R9 270x graphics card it was heating more than 90 degrees and hanging my system. So i changed the power supply and bought Cooler Master GX550W but the still the issue persist. I checked my card on my brothers PC it was working fine and on max settings it was going to 60 degree maximum (he have 500w supply). I switched the supply to check if problem is about suppy but even then it was heating on my PC. I have Intel DB75EN motherboard, 8GB ram, corei5 and 64 bit windows 7 professional. What could be the problem is it the motherboard or something else??????