I haven't had the need to switch to win10 so far, but I will test install it too, soon. But I haven't found a game that would run horribly on intel / nvidia, that only works under dx12... Then again, dx12 never was meant to drastically improve top notch systems either. Maybe under utilized top notch hardware, but never the ones that already performed great. That's under no circumstances on purpose... I will find it out soon, but I doubt feeling the difference, didn't feel it going from 7 to 8.1 either.