you have a 2500K? you still haven't filled out your system specs or anything.
BTW there is a BIOS F7A released today as well.
With 2600K there was an error where the board would not boot instead it would do code 8 and then nothing next to the 8, then reboot and got to the BIOS where only half the screen showed then the do dB and then boot up like nothing happened. I reported it and it was fixed with 2600K, but now it seems the 2500K has that issue, but only on cold boots or something. I have tried repeatedly to make it happen, but it isn't happening. Which makes me think it is memory related or perhaps related to some I/O devices. So i am still trying. I have a crap load of memory to test with some many different manufacturers.
But yea IDK what fixes F7 has put in place. I know the BIOS engineers were on a business trip for the last week, so hopefully this week a lot of these outstanding problems can get dealt with.
Try F7a, you have dual BIOS for a reason, you can always switch between BIOSes.
BTW please update your rig, use the rig builder thing. However your problems are odd, i would RMA it as well.
I also did see a guy with an asus p8z77 had this same issue where the board loops a few times before booting, he had a 2500K too,. so it could be an Intel problem.
You should see the amount of problems with the Z68/P67 boards and the new BIOSes for Ivy Bridge support, they are terrible in the other camp, you see a lot of bricked boards.