So no, the Ryzen 3600 is not a good CPU. It was a good entry level CPU 5,5 years ago.
Is 5080 also entry level gpu for you ?
You don't have a clue what entry level means. With 3600 you could achieve 95% in gaming of what best CPU at the time could do. 5xxx ryzens weren't even that huge upgrade over 3xxx series to begin with. Only X3D was the one that stood out with transformative performance (if game supported it). Since then we got 7 series which was definitely an 10-20% upgrade over 5000 series and 9xxx which is eve smaller upgrade than going from 5000 to 7000 and that one is like few months old recent.
Again. We are not talking here about some amazing looking game that pushes simulation up to 11.
We are talking here about 520p gaming on low in game that doesn't look better than 2015 game like Witcher 3 and isn't even open world game.
And it can't do 60fps lololol.
You are retaRd.
The 5080 paired with a Ryzen 3600 CPU will work like a low end machine, yes. Pairing such a GPU with this kind of CPU, aside from scientific purposes like testing CPU scaling of an engine/game, is absolute bonkers and has no right of working properly.
Here is a good example of CPU scaling with an RTX 4090 (don't mind the game title, it's pretty much the same scaling in all games):
The 3600 was always an entry level CPU which could achieve full GPU utilization when paired with an RX580, a GTX 1060, maybe an RTX 2060. An RTX3060 or a Radeon 6600XT would be underfed by the CPU in quite a few games, the newer the more substantial. It was cheap, it had 6 cores and 12 threads, worked great will the then middle end graphics card.
By today's standards the 3600 can be considered a sub low end processor.
Avowed is using a modern version of a commercially available engine. It uses Nanite and uses it well. It uses both software or hardware ray tracing, depending on settings. Does not support baked lighting or any other non ray traced method for its lighting. You may not like the style of the graphics, but no pop-in on distant objects is beautiful, the lighting and shadowing look natural (aside from a few issues with the denoiser shutting itself down occasionally).
Unreal Engine 5 will murder any CPU it is given. With that in mind, Avowed is well optimized. Again, we aren't talking about the game itself, just the rendering tech. Veilguard is also a wonderfully optimized game
PS: take a look at the graph and see how much of an upgrade the 5600 was over 3600.
PS2: there is no way to support or not support an X3D processor. It depends on which type of calculations a game uses for its logic - some stuff will rely on cache, others will be based solely around raw frequency.