I have non-k CPU i7 6700 and have the latest bios in my motherboard 7.20. Whenever I change the ratio the PC doesn't boot and have to reset the bios to make it boot. I've seen video of this mb on OC non k CPU but he had 1.6 bios. So I wanted to know whether downgrading BIOS is a good thing and if it is safe to perform in my case?