I have the same issue!
Would you please post your Systems?
My:
CPU: FX 8370 boxed cooler (50°C under full load)
GPU: R9 285 Sapphire OC version (70°C under full load)
MB: AsRock 990FX extreme 4
8 gig Ram
I am wondering whether this issue is a AMD specific problem.
Has anyone this issue with an Intel CPU?
What i have tried to solve that issue:
Disabling the APM function in the BIOS. It is a energy saving option and could cause that the CPU frequency will be throttled.
Disabling the Thermal Throttling option in the BIOS as well.
Set the power control slider under the Overdrive section of Catalyst Control Center to +20%. This allows the GPU card a higher power consumption.
But nothing has helped…