Should diable unsuported dGpu?

Hello, after some hard days i finally boot nearly 100% workibg dualboot system BigSur/W10

My spec is - open core 0.7 - RYZEN 5 3600, - MSI TOMAHAWK B450 MAX, -16GB RAM DDR4 -NVIDIA GT710 2GB DDR3

And there is my question. I want to use my RTX2060 on windows. I'm think that just disabling GT710 from device manager will make a trick for dual-cable input.

BUT od if I'll plug RTX and boot BIG SUR system will crash OR as this card is unsuported will be automaticly used 710?

Should I disable RTX PCI port in opencore or system will be manage this for me?

Thanks