Sin I try what you suggested and I think I nailed down my booting issue. Ran a few more test and went back and retrace my steps. After reading through a bunch of forums an idea dawn on me. I believe it is due to an unstable overclock, as I remember the very first time I overclock, when it was unstable it did give me a corrupt bios message when I try to boot up after a normal shutdown. It was the first time I had it happen. I cleared cmos and kept testing until I got what I thought was a stable OC. It seem my OC was not as stable as i thought, even though it didn't give me any error in stress test and never gave any problems in day to day use. However, it is somehow still unstable.
So I loaded my profile and it did it again, corrupt bios on boot up. The only thing I did different this time when it gave me the corrupted bios screen after starting the computer was I let it go through the process of loading and booting up from the backup bios, then have the computer power off and this time, I unplug power cord from power supply and clear cmos. So far, almost 5 days and never have the bios corrupt from booting up from a shut down. I never did bother to clear cmos the other 3 times. In my head I kept thinking, I loaded optimal default already, no need to clear cmos. Also, I have to admit I was lazy as well, no external clear cmos button and I didn't want to open the case everytime as I have my case on a very high shelf. Pointer to gigabyte, external clear cmos somewhere on the rear I/O panel can be useful. lolzx
Guess loading optimal default isn't enough and cmos still needs to be clear.
So yes, clear cmos people, even after loading optimal default. Working as a sysadmin too, most problem like 90% is cause by the user hahaha. Not afraid to admit i mess up, being just a bit lazy actually cause me more days of lost sleep , test and headache. Disobey one of the rule of IT - K
tupid lolzx. My problem had such an easy fix, just had to hit clear cmos after loading default. Will report back but as it been almost a week, I am more than confident this was the cause of my problem.
I went back to F6A because i don't think F4 or F5 is stable for me, on F4 and F5 even if I set my BCLK to 100 it was still jumping to between 99.4 and 99.8 but F6A it is running without deviation on 100 BCLK. Don't know how much of an issue that is but as I said, I am looking for stability, F6A just makes me feel better. Now if gigabyte or corsair ever fix the Keyboard issue, I am golden. I know I know, i am reaching now
Beside my own absent mindedness I do want to thank all the ideas and suggestions. I would have probably miss such a simple thing on my own. Really wanted to figure this out as I really do love this board and that duel bios has proven to be invaluable.