Modifying fan settings in the VGA BIOS

Discussion in 'Mac Pro' started by sekrit, Feb 10, 2015.

  1. sekrit, Feb 10, 2015
    Last edited: Feb 10, 2015

    sekrit macrumors newbie

    Feb 8, 2015
    I installed a nVidia GT 640 1024 DDR5 into a Mac Pro 3,1. I don't have any plans for overclocking or gaming. But the stock Nvidia fan is noisy even at idle use. Card only has a two pin power cable to the fan.

    Can I edit the BIOS fan settings and make it run at a slower speed? Settings in the BIOS for the fan adjustment is Min 16 and Max 25. I am not sure what these settings mean. How do I make the fan run slower at idle?

  2. maflynn Moderator


    Staff Member

    May 3, 2009
    Macs don't have Bios,, they use EFI and to my knowledge that's not accessible.
  3. sekrit thread starter macrumors newbie

    Feb 8, 2015
    Sorry if my post was not clear enough. I was asking about modifying the VGA BIOS, not MAC.
  4. lowendlinux Contributor


    Sep 24, 2014
    North Country (way upstate NY)
    last time I modded a two pin I soldered a Zallman rheostat fan controller to it.
  5. sekrit thread starter macrumors newbie

    Feb 8, 2015
    Thanks pal! Installed Zalman fan speed controller and the noise is gone even at the highest speed rating. Card idles at 46C.

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4 February 10, 2015