All in all, a whopping 1-2% increase. Yay!
I've been using Arch for over a decade, and I would advise you to be careful when upgrading nvidia drivers. They just break every so often. Just do not delete your pacman cache and you should be able to easily downgrade
I upgraded my 2600K to a 6600K and it felt like a 5x increase across the board. Same when I upgraded that to Ryzen 7 5800X