what brand are your GPU?... i can help you with some info if you have MSI tf3. pacpac
They are powercolors. If you have any clues, don't hesitate to share
with aticonfig --od-getclocks --adapter=all I can see that the gpuload gets down to 64%, then back to 99, the back to 64... like that.
annoying!
And this is with --gpu-powertune 20.