So it's been a really warm last few days in the usual rainy, wet and otherwise miserable UK. Today, for example, with lows of 24 degrees Celsius (75 F) and highs of 26-27 Celsius (78 F).
My GPU at idle temperature, with fans going about 50%, is sitting around 50C/122F. On attempting to play ArmA, after several minutes it skies up to 99C/210F.
I presumed it would be a cooling issues, but all the fans in my case are working, along with the GPU fan itself. I have installed all the latest drivers etc.
It's a Nvidia GTX 580 second hand reference card, by the way. Any advice on this would be appreciated!