OK so i've just updated to the F21 from F8 on the gaming 7 skylake , and everything has gone well .
@4.6 with 1.27 volts which is just a bit lower than i could get with F8 bios (1.30v) ,plus i like the new smart fan feature and bios layout .
Only ran prime95 for 15mins and all temps are in normal/expected parameters .
Bios looks good , so if you were like me and didn't update to the f20 bios because of the overvolting and other issues this f21 looks good so far .
Will update if problems arise ..
Update
So after a few more hour of running i've noticed that my front 2 USB 3.0 ports are only working at half speed after the update , in device manager i have Windows has stopped this device because it has reported problems. (Code 43) The SuperSpeed link to the USB device keeps going to an error
Ive tried all sort of fixes over the few hours to resolve this issue , it happens whenever i plug any any device into the front ports on my PC case that runs of the header on the motherboard .
The back USB 3.0 ports that are on the motherboard back plate working at full speed ..
Update 2
Problems sorted now , i just reset the cmos with battery and mains lead out and now all USB ports working within spec /Happy days again