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Thread: P67 UD4 bios update problem




  1. #1
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    Default P67 UD4 bios update problem

    im using qflash to update to F#, when it finishes reading the f3 bios on my flash drive it says checksum=DC00, whats up with that??

  2. #2
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    Default Re: P67 UD4 bios update problem

    Ive read that you have to flash with @bios to the newer bios's,then go back to using qflash,@bios and dual bios is much safer on those boards so don't worry
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  3. #3
    Lsdmeasap's Avatar
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    Default Re: P67 UD4 bios update problem

    Checksum is normal, as long as you see 4 digits you are good to go and can flash away.

    As mentioned above though if you get invalid image size or invalid BIOS you will need to use DOS/FlashSPI or @BIOS.

    But it sounds like you are already using the newer BIOS format otherwise you wouldn't have got the checksum in Qflash, so you can go ahead with Qflash if it lets you proceed after the checksum.

  4. #4
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    Default Re: P67 UD4 bios update problem

    Quote Originally Posted by mark2005 View Post
    im using qflash to update to F#, when it finishes reading the f3 bios on my flash drive it says checksum=DC00, whats up with that??
    I believe LSD has said as long as the check sum is 4 characters bios is ok. (LSD correct me if I am wrong)

    But like wazza said yes new bios you have to use @bios instead of q-flash but that is only if you are going from old bios file size 1024 kb vs new bios size 2048 kb file size. New bios size is larger because of added in efi for +3tb hdds. Once you are flashed to the new bios you can use ALT+F12 at boot to flash back up bios to the new one if you like or not. After that you can continue to use q-flash for all other updates.
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    Default Re: P67 UD4 bios update problem

    Quote Originally Posted by Lsdmeasap View Post
    Checksum is normal, as long as you see 4 digits you are good to go and can flash away.

    As mentioned above though if you get invalid image size or invalid BIOS you will need to use DOS/FlashSPI or @BIOS.

    But it sounds like you are already using the newer BIOS format otherwise you wouldn't have got the checksum in Qflash, so you can go ahead with Qflash if it lets you proceed after the checksum.
    Good to see i was correct but LSD has faster typing skills :)
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  6. #6
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