Overclocking ATI video cards on OS X without BIOS flashes

Discussion in 'Macintosh Computers' started by oingoboingo, Aug 30, 2004.

  1. macrumors 6502a

    oingoboingo

    Joined:
    Jul 31, 2003
    Location:
    Sydney, Australia
    #1
    I just noticed this piece of news over at the xlr8yourmac.com forums. ATIccelerator II is a piece of software which allows dynamic adjustment of the GPU and memory clock speeds of ATI graphics cards under Mac OS X, without the need for BIOS flashing or rebooting. I haven't checked it out on my G5 1.6GHz / Radeon 9600 Pro yet, but I will in a few minutes. Check it out and see what you think:

    http://thomas.perrier.name/software/ATIcceleratorII.html
     
  2. Wes
    macrumors 68020

    Wes

    Joined:
    Jun 22, 2001
    Location:
    London
    #2
    Hmmm this sounds very interesting, I wonder how far it is 'safe' to take a 9000 pro. 5% too much?
     
  3. thread starter macrumors 6502a

    oingoboingo

    Joined:
    Jul 31, 2003
    Location:
    Sydney, Australia
    #3
  4. Wes
    macrumors 68020

    Wes

    Joined:
    Jun 22, 2001
    Location:
    London
    #4
    I'm testing out my 9000 Pro on Desert Combat (BF1942 mod, very good btw).

    Tried 15%/15%, major artifacts on launch, quit the game and did a restart.

    Started out at 5%/5%, running the game fine, turned cpu to 6.5%, still going okay, I'll give another update as to how it goes.

    My card only has a heatsink, will it realise it's going to fry itself and turn off?
     
  5. thread starter macrumors 6502a

    oingoboingo

    Joined:
    Jul 31, 2003
    Location:
    Sydney, Australia
    #5
    Hmmm...not sure. I think you'll start to see graphical artifacts (like wierd blinking pixels and corrupted textures) if you're pushing the RAM too far, and I think the GPU getting too hot and angry mostly leads to lockups. It's been so long since I've been into the whole overclocking thing that I can't really remember! :) The rule is always to just gradually increment the clockspeed, see if things are stable, then try to add a little more. If you're getting long-term stability at 6.5% core, then it would seem to be OK.
     
  6. macrumors regular

    Dale Cooper

    Joined:
    Sep 20, 2005

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