Originally Posted by MrWhiteRX7
I'd highly recommend using OverclockNtool instead of wattman. Setup a profile that disables all pstates except p7 / p3 and undervolt overclock from there. It will be as steady as you're ever going to get it. When out of the game just reset back to factory.
Thats a terrible way to do it, which i do not recommend. Disabling the other states is always bringing problems. Wattman actually is way better than such annoying tools.