You really cant have too much available power. The closer you run to the rail, the less headroom you have as it ages. Also you tax it less. It will only supply as much as needed so exceeding requirements only comes at the price difference (which is slight).

I have had problems like these before with the key difference being video card. Doesnt matter if someone has a 1660 or a 4090; this can happen due to overall system stability. While it can he game side, in my experience, its hardware and driver settings. I have a beast pc that I recently built and until I got it all happy working together, I had issues like this. Having nvidia, getting my xmp, cooling and disabling mpo eventually got rid of it all.

So considering it sounds like you built it yourself, how aboit fan configuration? Do you have cool air sucking in the bottom and/or front and hot exhausting thru the back/top? A read on your cpu temp might give a clue as to if heat is your problem.