I have a radeon hd 6670, and I have overclocked the GPU clock to 850 MHz and the memory clock to 1040 MHz. I then ran Diablo 3 with SpeedFan running in the background to check the heat of the GPU, and it was at 53 degrees Celsius. This doesn't seem to be too bad, but there was a flame icon next to this temperature in the SpeedFan app. How hot is too hot for a graphics card?
If this is too hot, should I not overclock it or just install more case fans too keep it cool?