Nvidia pc card (non EFI) on Mac pro 3.1

[filipposmacgr]

I have a mac pro early 2008 running on the latest Yosemite OS and i want to upgrade the original gpu (nvidia geforce 8800 GT) with a new nvidia gpu.

i have found on my local pc store a lot of new GTX750 ti models for about 120-140euros which is my fine for my budget.

Will they plug and play if i first install the apropriate *nvidia drivers :

• 10.10.5 has 346.02.03f01 (14F27), 346.02.03f02 (14F1021)

*as found on this thread :
https://forums.macrumors.com/thread...out-nvidia-pc-non-efi-graphics-cards.1440150/

or do i need to flash them?

 

[pastrychef]

Mac EFI firmware will give you boot screen. Without it, they will not show anything until OS X and the video drivers are loaded. Once the drivers are loaded, they work fine.

 

[SteveJobzniak]

@filipposmacgr Install a PC nVidia card in a Mac Pro and Fix Mac Pro fans when using PC (non-EFI) GPUs will help you out. Good luck!

 

[filipposmacgr]

@filipposmacgr Install a PC nVidia card in a Mac Pro and Fix Mac Pro fans when using PC (non-EFI) GPUs will help you out. Good luck!

It worked fine! I successfully installed a GTX 750 Ti and i am also getting the both OS and nvidia updates!!!!
The only problem is that a fan kicks in very often and goes extremelly loud.

I downloaded the macsfancontrol software and i see the following metrics

CPU_MEM - This goes up high!
IO - This stays cool
EXHAUST - This goes up high!
PS - This stays cool
*See the attached file

Does anyone know a safe custom setup for CPU_MEM and EXHAUST to keep the noise down?

 

[SteveJobzniak]

@filipposmacgr Great to hear it worked.

But your fan theories are wrong. Just use the macfancontrol settings described in that htread discussion: https://forums.macrumors.com/thread...when-using-pc-non-efi-graphics-cards.1946672/