It's been 3 years since I've had this gpu. So for the first 30 minutes after I turn my pc on, the fan works like a charm, fulfilling every command I'm throwing at it(via firestorm) . But after 30 minutes, the speed of fan starts fluctuating on its own and it goes from 10 percent fan speed to 80-100 percent fan speed continuously for the next 5 minutes. After that the fan becomes unresponsive with its speed fluctuating between 0-20 percent.I can't even run fm on my pc. Any help would be greatly appreciated.