Open a monitoring utility like HWinfo64 to record your CPU's default voltages and clock speeds under both idle and full-load scenarios.
BIOS changes require a restart. AMDMSR v11 applies changes on the fly. Are you benching Cinebench and need higher voltage? Apply it instantly. Did your game crash due to an unstable overclock? Revert settings in one click.
Some possible sources for AMD MSR Tweaker v11 include: