Overclocking 4890 in OSX

Discussion in 'Mac Pro' started by exabrial, Aug 31, 2009.

  1. exabrial macrumors member

    Joined:
    Mar 4, 2008
    #1
    Using Netkas' Hybrid EFI ROM, I'm able to use a 4890 in Osx :D

    In windows, I can easily clock my card up to 975mhz without stability issues. I'd like to repeat the performance in OSX, because the card runs at a much pokier speed.

    Is it possible to hexedit the efi portion to do this? Has this been covered and my searches just unsuccessfully?
     
  2. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #2
    Just changes speeds in PC portion of ROM. All EFI does is say "Hi, How are ya" and give you a couple boot screens. After that it is running from PC BIOS.

    Try using Radeon BIOS Editor. (goes by Rabit, I think)
     

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