After I cleaned my computer, my R9 was running with low GPU USAGE (around 24% in games like BF4 and CS:GO). I tried everything.
Uninstalled and installed the Catalyst a lot of times, tested all my Hardware and nothing. So, I noticed something using the CPUZ: It was running with a cloack of 500MHZ and int he MSI Afterburner was showing the normal Cloack. What might be happening?