Question about be quiet! Pure Rock 2 FX

It will be able to cool it well, but not really optimally because the 7800x3D can get quite warm, so I would rather recommend larger coolers.
Cooler master Hyper 622 halo
Deepcool AK500 digital
Deepcool AK620
These would be my recommendations for the cheapest price, best to compare via Idealo.
Good luck on your search.
MfG