Anyone found a fix for the poor performance ?

I'm getting horrible performance on Horizon 6, I've only just gotten to pick my first car.

I'm seeing 15fps on low at 1080p.

My setup is a Ryzen 2600x, 1080ti, 36gb of 3666mhz ram. A decent SSD.

Fresh install of windows, updated all the drivers.

I have no problems playing horizon 5 at 4k medium/high settings.