I have a VTX3D HD 7870XT Black Edition graphic card. While running a game, my GPU fan speed increases to 100% in a short time (about 2 - 5 minutes after launching the game). I used MSI Afterburner to get the temperature while playing and it grows very fast, reaching 88°C. It is only when it is at that temperature that the fan automaticaly speeds up to its maximal speed.
To prevent my GPU from reaching these high temperatures, the only thing I found was to set the GPU fan to a custom speed in AMD Catalyst Control Center. I have to set it to 70% to prevent my GPU from getting hot.
Also, if I set a custom fan speed smaller than 70% (it's an average), sometimes after a short time it decreases to normal speed, some other times the speed set is simply ignored (the fan doesn't accelerate at all).
I tried to update GPU drivers (with the last version from the 01/02/2016) but it hasn't fixed the problem.
My OS is a Windows 7 64bits.
Thanks in advance for your answers.