My new ryzen 5600G voltage drops from 1.300 to even 0.400(Aida64 and cpuz monitoring) and 0.070 ryzen master monitoring. Both happens only when the pc is fully idle and I don't even move the mouse. Is this normal or not?
CPUs using less voltages in idle is fully normal, yes. It should alao drop core clocks at the same time. The same behavior can be observed in GPUs as well. The CPU is working as intended.