Help with best performance setting?

Well the game ready driver isnt out yet , so you have to wait .

You're not alone, i got the same GPU, but a i5 2500k and yeah it runs terrible.

I get above 60fps though but the mouse movement is the issue.

I hear alot of ppl with a mid range amd gpu are getting way better performance, we probably just have to wait for NVIDIA to release a new driver, but the beta already ends today or tomorrow.
Doubt they'll release a driver for the beta before then.

the best you can do is to send a ticket to support and hope for a fix. clearly it is an issue when a decent rig cant run it properly