MP 1,1-5,1 Mac Pro 3.1 glitches with gtx 660 gk104

[palcoletge]

Hi there, I'm new here at macrumors. I know that ASUS GTX 660 Ti DirectCU II have glitches since high sierra. But I don't understand why I read that this one ( GTX660-TI-DC2-2GD5 ) with the gk104 graphics procesor works with hackingtosh, why not work with mac pro 3.1?
I tried with High Sierra and Mojave, but always there are glitches.
I will have the same problem with GIGABYTE GTX 680 WindForce 3X OC?

 

[palcoletge]

Never find a solution or answer.
At the end I have installed a GTX 680 2gb and flashed myself
Now it's my workstation with mojave, runs like a charm