I have tried it. But the memory performance is slower than F4 BIOS. While F4 BIOS memory performance is slower than F3 BIOS.
So, I now stick with F3 BIOS.

But, my cold double boot problem is still exist. Gigabyte technical service hasn't replied my mail yet. Now I'm forced to leave my power cord connected while off, something that I rarely do before. So sad...