Why does my Biostar B350ET2 overheat during complex terrain in Pacific Drive?

I felt the immersion break when Pacific Drive stuttered on rough terrain. The Biostar B350ET2 VRM spiked to 85-92℃, causing visible suspension lag. I tried locking the CPU frequency, but it dropped FPS from 60 to 45, which was useless. Then I used the GamePP Resource Scheduler to set the process to real-time priority and switched to High Performance. GamePP Hardware Sensor showed the VRM temperature dropping from 92℃ to a stable 78℃. RTSS confirmed the frame time stabilized at 16.7ms, and the package power fluctuation stayed within ±3.2W.