Upgrading CPU, pc is either not posting or sending signal to monitor, any help?

Hey all, okay so I posted this before but decided it was a faulty CPU, now with a new one the same problem is occurring...

I had an AMD 2600x for years, but I wanted to upgrade to the 5700x as I've just upgraded my GPU from a rx580 to a 7800xt.

My board is an Asus x470-F gaming.

With my old cpu, everything runs (though my machine has some driver issues, which I plan to factory once I see everything working).

As soon as I put the new one in, double boot as it usually does if I've changed something. With the new CPU, the screen does not show or do anything, it appears to stay on standby. If I put my old CPU back in, back to normal and posts.

I have done the following: - cleared my CMOS, both via the pins and removing the battery. - taken out two RAM sticks (4 total) to see if that works. -Updated the BIOS to the latest version 1 week ago. - keyboard and mouse light up, and the caps light comes on when toggled.

I'm legit so unbelievably lost here and have never seen this, so any help is appreciated.