Hi,
    I update my P55 LE bios(A51) to fix the ipod problem. But I forget to write down the value I used. Now the system won't boot. I use Win7 with i5-750 overclocked 3600. I changed voltage, it sometime show up "d3" error code(which I can't find it in error code) and no post. If it post, Win7 said it required repaired, but it never success. I change i5 to default 2660, Win7 still said it required repaired.

Any suggest to fix it? Thank you.

fox

I did use clear CMOS button when upgrade or "d3" show. Now I flash it back to A39, "d3" problem gone, but I still unable to boot the Win7. It always said Win7 need to repaird or continue normally. But "repairing" will said it can't be repaired, "continue normally" will restart during win7 booting. 

same problem **** man without xmp profiles my rams are not running at stated speeds i get d4 problems with my p55 ftw decided to flash back to old bios cuz the new bios makes me have to clear cmos everytime i startup  my rams are team xtreem 1600mhz cl 7 LV btw.