I recently noticed while litecoin mining that my gpu temps were unusually high, I also saw that my fans were reporting that they are running at 100%. But the rpm said different, it was about 2600. Usually while at 100% the fans run at 3400 rpm. I thought that maybe it somehow got "stuck" at 75% or something, so I tried turning them down and up manually. After setting it back to 100% the rpm kept jumping from around 2600 to 3400. It eventually settled at 3400 for a couple minutes before reverting back to 2600 rpm. I am running 13.6 beta driver so I tried a couple of older drivers but there was no improvment. Also, at seemingly random times the rpm that is being reported spikes alarmingly high, as in hundreds of thousands. Obviously the fans can't rotate that fast and from the sound of them they are spinning at a fairly constant rate. I also tried multiple monitoring/fan programs such as gpu-z, msi afterburner, speedfan, etc... As of right now I have my desk fan next to my open computer as the speed is still randomly changing to 2600rpm. So, if you have not yet closed this tab out of bordom, what could you suggest other than reinstalling windows? I 'm thinking that it could maybe be conflicting software, or could it be on the hardware side? (as I am wrapping this up it dropped back to nearly 2500 :( )
You could always flash another gigabyte bios to the card.
http://www.techpowerup.com/downloads/Utilities/BIOS_Flashing/ATI/
Bios collection;
Or edit your existing via RBE http://www.techpowerup.com/downloads/Utilities/RBE/