I just upgraded my BIOS from F6 to F20b and my dual boot PC booted Windows 10 normally but it kept getting a BSOD error when attempting to boot Win 7. I used all of the BIOS defaults except I turned on RAID. I re-flashed BIOS F6 and everything now boots properly.
I also tried an OC with F20b and Win 10 and I noticed that F20b would not allow my system to hit my 1-Core clock speed. It seemed as though more than 1 core was always active no matter what I was doing. In addition, when the PC was at idle F20b would not throttle down as far as F6 does. F6 goes down to 8x100, while F20b would only go down to 9x100.