I have a HIS Radeon 6970 graphics card. The fan is beginning to act strange. It is constant revving and de-revving, as though it is constantly on the verge of wanting to get that higher fan speed. The fan use to only go that fast when I was doing video editing, but now even on idle every few minutes it spins faster and sometimes stays at that high speed.
I am monitoring the temperature and it is a consistent 37-40Celsius, regardless if it is running at the high or low speeds. I can apply a little pressure to the fan and it will spin at the lower speed for a few minutes, but then it goes back to revving really fast. I'll be doing something like watching YouTube and all of a sudden I hear my graphics card fan go full or near full speed until I restart my computer.
Even in the Catalyst Control Center, I can manually change the fan speed to its lowest speed, but even then it is louder than it is on startup. Anyone have any ideas?