How to fix severe thermal throttling on the Biostar B550MH board?
I ran a side-by-side comparison for this. First, I hammered it with Prime95 for 30 minutes, and the CPU temp shot up to 88°C - 92°C instantly, triggering a massive downclock. I tried setting the fans to 100% in Windows, which dropped temps to 76°C - 80°C, but the 55dB noise was like having a jet engine in my room. I went into the BIOS, navigated to the Hardware Monitor, and set a stepped curve: 1200 RPM below 60°C, and ramping up to 1510 RPM at 75°C. OCCT confirmed the VRM cooling efficiency improved to 84% - 89%, and the noise stayed tolerable. In-game, frame variance dropped by 5% - 8%, and those heat-induced dips stopped. The only downside is the tiny heatsink on this board; if your room is over 30°C, you'll still see some temp spikes. It's just not built for absolute thermal stability.
