MacOS catalina 10.15.7 = Asus GTX 780 DIRECTCU II driver issue

hello everyone

I have a Gigabyte GA-Z87X-UD3H motherboard

graphics card is Asus GTX 780 DIRECTCU II

I installed MacOS catalina 10.15.7 (19H15)

almost everything done but I can't found graphics card driver. I searched but I didn't understand is it supported for Catalina or not

and also I couldn't worked for audio setups.

I need professional helps of yours.

thank you so much!!