I am on windows 10 with latest amd drivers. I have 3 rx 570s and 1 rx 470s they are not bios modded or overclocked. When I use -strap 1 and -rxboost and I increase mclock I only get 26 mh/s. I tried on phoenix miner and when I use -mt it crashes instantly. Why am I not gettings 29-30 mh/s ? Should I bios mod?