Upgrade to Big Sur needs a new GPU ?

Hello guys, i'm currently using a 2015 15" MBP as workstation and i have recently built a new rig based on a Ryzen 3900XT / x570 / RTX 3080 combo and i would love to use it as a dual boot Hackintosh.

My previous Hackintosh used a GTX 1080 but if i'm not wrong, Big Sur is not compatible anymore with them, which leaves me with a choice :

What would be the best choice for you guys ?

Author: @Lywqf