https://bugs.freedesktop.org/show_bug.cgi?id=103736
--- Comment #2 from Andres Rodriguez andresx7@gmail.com ---
FWIW, Andres Rodriguez reported similar symptoms with a Ryzen system on IRC, and raising voltages / disabling Cool'n'Quiet / disabling C6 states fixed them for him.
I raised the memory and the core voltages specifically. The other voltages like SoC were left untouched.