nVidia and ATI Graphics Cards

Discussion in 'Mac Accessories' started by 3282868, Mar 27, 2010.

  1. 3282868 macrumors 603

    Jan 8, 2009
    I have an ATI Radeon HD 4870 and an nVidia GeForce 8800GT that were originally used in my Mac Pro. I have another video card that is currently running in my 8 core 3,1 Mac Pro, so I am not using the other two graphics cards.

    I am trying to use them in a Windows based system I built.

    System Specs:

    ASRock P45DE3 Motherboard
    - PCI Express 2.0 x16
    - PCI Express 1 (x3)
    - PCI (x2)
    Intel Core2Duo E7500 2.93GHz 775 socket processor
    Antec Three Hundred Mini Tower

    I know I have to flash either graphics card to work with the PCI Express 2.0 slot. I have installed each one separately without any video output (nothing comes up at all). I have the nVidia flash files (I haven't checked into the ATI Radeon HD 4870 yet), but I do not know what to do in order to boot the system with the card in order to flash it. I do have a GeForce 8400GS that works in the system, but I'd rather not spend the ~$60 for a card I do not need when I have perfectly working graphics cards. Do I need to have TWO graphics cards installed and running, the nVidia GeForce 8400 to boot and the other to flash? If that is the case I'll have to find another system as I only have one PCI Express 2.0 x16 slot to utilize.

    Any suggestions? What may I be doing wrong? THANKS!
  2. DLary macrumors member

    Oct 21, 2005
    Look for a program called NVFlash. Download the latest version and make sure you have the correct BIOS for the card you want to flash. Make a bootable USB and put NVFlash and the BIOS on the USB stick. Boot the PC with the USB and type NVFlash at the prompt. The instructions should appear on how to load the BIOS.

    If the Mac version of the card has a different ROM chip than the PC version you may be out of luck. If the flash program returns an error because of an incompatibility between ROM chips, you might be able to force it to install anyways, (this may result in the card becoming unusable if the flash fails)

    I don't know what flash program ATI uses, but I suspect the process is similar.
  3. 3282868 thread starter macrumors 603

    Jan 8, 2009
    Thanks! I found the original BIOS for the nVidia GeForce 8800GT, and will reboot into my Windows 7 drive to make a bootable USB DOS for flashing the card. Hope it works. Thanks again!
  4. bozz2006 macrumors 68030


    Aug 24, 2007
    I think you'd be better off selling those two cards and buying a PC card. You'd probably even be a few dollars ahead.

Share This Page