Nvidia GTX 970 0Mo instead of 4Gb RAM + Video Glitches

Hi.

I just start with hackintosh
I (think) I correctly installed NVIDIA WEB DRIVER because
nvda_drv=1 is OK

BUT as you can see


View attachment 196252
My System indicates that my GTX has 0Mo RAM instead of 4GB
And I have terrible glitches whenever i open a fullscreen video.

I Guess there is a problem here,
but I don't find any explanations.


Thanks for your support