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

That's enough, but it will definitely get louder because the cooler has to get rid of the heat.
I would therefore recommend a slightly larger one.
I would go for this one, because it's definitely worth the money and it stays relatively quiet.
be quiet! Dark Rock Pro 5 (168 mm)
Please write if you have any further questions.