My Maxsun MS-Challenger B850M-K keeps dipping clocks during big attacks in Unknown 9, why is this?

Whenever I switch to stealth or trigger a major ability, the frame rate just craters from 120 FPS down to 55 FPS without any warning. It's a total nightmare for immersion. After digging into the logs, I found the VRM on the Maxsun MS-Challenger B850M-K was swinging between 0.08V and 0.12V during transient spikes, which basically forced the CPU into a safety throttle. I tried the 'High Performance' power plan in Windows, but the frame times were still jumping between 20ms and 40ms—completely useless. I eventually dove into the BIOS, navigated to Advanced, then Voltage, and switched the CPU Core Voltage from Auto to Manual, locking it at 1.25V. I also bumped the PL1 power limit up to 150W. Checking RTSS, the frame times finally settled from a chaotic 12-45ms range down to a rock steady 8-14ms. I did have a couple of random reboots at first, but once I set the Load-Line Calibration (LLC) to Level 3, it became stable. VRM temps are sitting around 68-75℃ now. HWInfo confirms the voltage curve is a flat line and the game feels buttery smooth.