Hey p4p0r, here's a different train of thought from the others who have replied - I have a very, very similar system to you with the exception of more RAM and a heftier GPU with seemingly no issues.
Given that you have the Adrenaline overlay up-and-running, I'm going to conclude that your GPU drivers are up-to-date!
Here's the thing, Ryzen is fickle when it comes to RAM, so my question is this - Are you running single or dual channel memory? More specifically, how many DIMMs (sticks) are installed in your system?
If you have a singular DIMM (one stick), the bad news is that Ryzen really hates single-channel memory. Provided you have multiple DIMMs (two sticks, or very unlikely four) check that your "XMP" or "DOCP" profile in BIOS is actually set to 3200MHz!
If all else fails, I have personally seen some wilder stuff on AM4 (CPU Platform) be resolved by updating the BIOS, so I'd give that a whirl after checking the aforementioned things out!
P.S. Just run the game on high settings instead of the literal maximum, your RX7600 *will* prefer it that way. Good luck!
