i tried F7 and it totally screwed my overclock.
i was able to boot 100% @ 450mhz and ram at 1125 5-5-5-15
but with F7 the P.O.S.T. failed at the ram test part.

i tried everything and nothing helped.
so i went back to F6

F7d also had my ram overclocking totally screwed up.
if the overclock failed the system wouldnt even post. it would turn on and just sit there.
and i had to swap ram around to all the slots and eventually it would boot with 1 stick.

frankly any bios related to F7 has been bad.

i'm sticking with F6