Asus continues to disgrace itself. I have a Strix x670E-F but I'm starting to think about getting an MSI. https://www.youtube.com/watch?v=cbGfc-JBxlY&t=1s

I checked. Occasionally it goes above 5050mhz. Usually around 4900mhz.

ABCLK 103 and Lvl1.

I set lvl 1 and PBO CO auto.

Same problem. For now, you can try the Pbo Enhanced. It's running at 5200mhz. Leave other settings auto.