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Could someone edit my 4770 bios to up voltage?

Discussion in 'AMD / ATI' started by reverze, Nov 5, 2012.

  1. reverze

    Dec 28, 2007
    1,368 (0.47/day)
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    So around 2-3 years ago i had a Sapphire 4770 blue pcb with artic cooling solution.

    From day 1 the stock clock of 750mhz was not stable, resulting in minor artifacting , soon after i got a 4890 and forgot about the card.

    Now i am building a rig out of old parts for a friend and figured ill try the 4770 again , downclocked the card from 750 to 650mhz and unigine benchmark was suddenly artifact free.

    So i figured if the difference is so minor, it cant be a completely broken card. so i downloaded trixx and upped the voltage from 0.95 to 1.00 and viola 750mhz ran flawless.

    now trixx is acting a tad picky, sometimes applying voltage, sometimes defaulting, and wont keep the setting when restarting the computer.

    I hoped someone could edit my bios to up the voltage so the changes at permanent.

    Ive uploaded it below


    Also are there windows solution out there to flash these custom bios'?

    Thanks in advance!
  2. Law-II


    May 9, 2011
    1,844 (1.11/day)
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    Mainland Britain

    Make sure you are well read in bios recovery before attempting a vga flash


    Download GPU-Z and run GPU-Z

    Then make a backup of your vga bios [save to file]; keep it safe

    Example Extract vga bios.jpg


    Download RBE version 1.25 from TPU [our software] and run RBE; then load your vga bios image

    Example RBE 1.25 Example.jpg

    Select Clock Settings tab

    Example RBE 1.25 Clock info 02 & GPU registers Example.jpg

    edit GPU (MHz): Clock info 02 from 500 and change to 750

    next; adjust Voltage registers: select GPU registers

    Example RBE 1.25 GPU voltage registers Example.jpg

    next; change 0xD5 from 0.95 to 1

    next: save BIOS

    Note: it is best practice to flash bioses from a dos prompt

    Edit: Bootable flash drive http://www.techpowerup.com/forums/showthread.php?t=162964

    However you can use ATI Winflash - [open windows task manager and close all unessential programs before running ati winflash] ; http://www.techpowerup.com/downloads/2107/ATI Winflash [this is the latest version]

    atb (all the best)

    Last edited: Nov 10, 2012
    reverze says thanks.
  3. reverze

    Dec 28, 2007
    1,368 (0.47/day)
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    thanks law! will try it this weekend

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