So the Ryzen name is associated with the CPU line of AMD, not the GPU line. I think you mean the AMD Radeon RX 6700XT is the video card you are having problems with. Have you installed the latest graphics drivers? Is you computer otherwise running fine for normal activities besides gaming?
I recommend you use this link and have the AMD autodetect tool check and update your chipset drivers too. It works well for me when I build a new computer.
After the updates, then try a few of the games to see if they are more playable. You shouldn't need to under-volt or do other tricks to get a good gaming experience from that video card at 1080p resolution. Make sure you have good airflow around the card so it doesn't get too warm.
As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".
