yes, you are right, i need put in my video card -17% in power limit for play any videogame and with any driver(with 17.10.2/3 or 11.1 i can't play nothing) in the last update of windows version 1709 build 16299.19, currently i play with the last driver WHQL 17.9.3, but i cant play Wolfenstein II The New Colossus, because that game need 17.10.3 or higher, but anothers videogames yes, sound like when polaris video card are out for sale in 2016, all video card had the same problem with the first drivers for polaris.
I tried to play with 17.9.3
It doesn't help. The strange thing is that the driver crashes randomly.
It crashed in WOT menu, while there were very small GPU usage.
I've got similar issues and using 17.7.1 (the newest stable driver) fixed the issues.
If you wanna see my experience with AMD's drivers , i recommend reading my topic : RX 480 Random Crashes 17.10.3/17.11.1 Win 10 FCU