AMDMSR Tweaker is the only lightweight, scriptable, low-level AMD MSR tool without bloat, but it lacks safety features.

Disables Application Power Management to prevent TDP throttling. AmdMsrTweaker P2

The formula for frequency is: (FID / DID) * 200MHz . The formula for voltage is: 1.550V - (VID * 0.00625V) .

If your CPU is bouncing off the power limit during idle.

If it's an old system, I can help you decode your specific CPU's FID/DID/VID table. If it's a new system, I can guide you through AMD Ryzen Master instead.