Hey there,
I would have to agree with
@sycoreaper on this one. Neither your CPU or GPU will stand the test at 4k. You need a bit of both.
Get a 5800x3d, and a mid to high end GPU., maybe some fast ram.
To get a better idea, open up your NVCP, and set DLDSR to on, and set it to 4 k (I do this with my 1080p panel and upscale to 1440p). You can also upscale to 4k. It will show you roughly what FPS you will get in
your games.
As a min, I'd be suggesting the 5800x3d/5700x and something like a 4080 with 16gb vram. Keep your current mem, motherboard. PSU might need upgrading too.
Keep in mind though. That would be the last step in upgrading your current system. After that you really do need a new platform. However, some of your parts will transfer to a new system. GPU/PSU etc.
The 3060ti is decent enough at 1440p. Unless your a pro gamer, getting a Freesync monitor, and using a DP port, you can get G-sync, which really smoothes things out.