Looking for custom Nvidia GT 640 ROM

Discussion in 'Mac Pro' started by sekrit, Feb 8, 2015.

  1. sekrit macrumors newbie

    Feb 8, 2015
    I replaced original 8800GT with GeForce GT 640 1GB DDR5. Installed the CUDA driver and Nvidia web driver. It seems to be working so far. I would like to update the ROM to make it fully compatible with Mac. My search so far did not reveal and custom ROM for this card. How can I modify the stock ROM on this card so that I can see Apple boot screen? Fan is a bit loud too. Thanks.
  2. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
  3. sekrit thread starter macrumors newbie

    Feb 8, 2015
    I was reading the forums and I thought you read the stock EEPROM, inject EFI to it and reflash it. There are no instructions for the GT 640 yet probably because it works OOB. I thought I could modify it's firmware and reflash. Do I really have to de-solder and re-solder the EEPROM to do this?
  4. sekrit, Feb 9, 2015
    Last edited: Feb 9, 2015

    sekrit thread starter macrumors newbie

    Feb 8, 2015
    I read that stock ROM chips are not large enough to hold both. Thanks for your help dude. Sorry but $90 + shipping is too much for a ROM chip just to show the boot screen.

    Nvidia GT 640 works like a native Apple card so far in a Mac Pro 3.1. Wakes up from sleep instantly.

    I will look for a less noisy cooling fan.
  5. philliplakis macrumors member

    Nov 19, 2014
    There is a general mis conception on this and it's constntly popping up.

    I too was one of them prior to understanding ...

    The problem being with Google and the scripts for the 5xxx,6xxx&7xxx also the R9 2xx

    When you search you a led to believe that it's as simple as the script you see, which at glance is

    ATI cards are as simple as what you have just posted (in a sense)
    Not anyone can but anyone with a nak for computers can do it. I had some trouble at first but once you understand it it's easy.

    But then there are Nvidia cards, and the 680 causes confusions aswell. Really simple to flash.

    But any other ATI or Nvidia card other than the ones above as not a home job, well for some maybe changing the eeprom is easy but there are not alot of people who would do this.

    In all honesty if you need boot screens and a GTX buy a pc 680 and flash it.
    ATI is your best bet for a do it at home job.
  6. sekrit thread starter macrumors newbie

    Feb 8, 2015
    Thanx. I understand it better now. I wanted a faster card to use it for 27" screen, not to play games with GTX680. I think I will stick with GT 640 which is faster than original 8800GT.
  7. d3vCr0w macrumors newbie


    Jan 23, 2016
    Hi, in the end, could you flash the card? I also have th GeForce GT640 and I am looking as well for the ROM
  8. orph macrumors 65816

    Dec 12, 2005

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