MP 1,1-5,1 PC GPU in Classic Mac Pro

[max2020]

Hi everyone, I have a Mac Pro with no gpu and would like to install something like a 1080ti, but I read that you need a propietary six pin cable that connects to the motherboard. Can you give the name or link of where I can buy that cable for a 1080ti? Thank you

 

[MarkC426]

https://forums.macrumors.com/threads/gpu-compatibility-list-for-cmp.2174600/
Last card in the list page 1.
This requires more power than the motherboard can provide.
Also only works up to High Sierra.

 

[max2020]

Thank you, I looked up and realized that. So now I am thinking of doing the Pixlas Mod and install a Gigabyte 5700XT. Do you think it will work?

 

[flowrider]

Asked and answered in another thread?

Hi everyone, I have a Mac Pro with no GPU and no GPU cables, and would like to install something like an nVidia 6xx/7xx/9xx/10xx, but I read that you can't use the cable that comes with the card, you need a propietary Apple six pin cable that connects to the motherboard and then to the GPU. Is this correct? Can you give the name or link of where I can buy that cable? Thank you

The 4,1 and 5,1 have a “Mini 6 pin” connector on their board (not sure about the other models). Remember to treat the mini 6 pins like normal 6 pins by not getting a mini 6 pin to 8 pin, or you can overload the backplane (dual mini 6 pin to 8 pin is standard here though ?).

Be aware you may have driver issues, make sure to do research before you buy a Nvidia GPU.

Edit: Just search “mini 6 pin to 6 pin” or “dual mini 6 pin to 8 pin“ on Amazon or something to get the cable for you ?

Lou

 

[MarkC426]

Thank you, I looked up and realized that. So now I am thinking of doing the Pixlas Mod and install a Gigabyte 5700XT. Do you think it will work?

The 5700XT needs Catalina drivers.
Catalina is not officially supported in cMP.
There are ways around it, but you need to look at the dedicated forums, and it’s a lot of fiddling to do.
My recommendation is RX580 pulse...plug and play.

 

[georgia-ctsv]

No cable needed for a MSI nVidia GT710. Works right out of the box I'm running it on my cMP 3,1 on catalina.

 

[flyproductions]

nVidia GT710

I’m afraid, this one is "not exactly" what he is looking for.

 

[georgia-ctsv]

Depends on what he's using the cMP for. If it's gaming then of course no. I have a hackintosh and a cMP 3,1 both running off the MSI GT710 with fan and it does what ever I need as far as video streaming and such. Big thing is it's cheap and it works out of the box on Catalina.