Solving VRM overheating on Maxsun MS-Challenger B850M-K
The power delivery on this board is basically naked when facing a 128-player battlefield; as soon as the screen fills with explosions, I get a BSOD. The VRM temps on my Maxsun MS-Challenger B850M-K were hitting 102°C - 108°C, triggering a hard thermal shutdown. I tried stuffing three extra case fans in there to blast the board, but it only dropped the temp by 5 degrees—absolutely ridiculous. I finally gave up and capped the CPU max boost frequency at 4.8GHz in the BIOS and forced the VRM fan curve to 100% full blast. In OCCT, the core temps stabilized at 72°C - 78°C with no more voltage drops. My first attempt at undervolting just caused the game to hang on the loading screen until I tweaked the Vcore offset. Now the fans sound like a jet engine taking off, but at least I can play for two hours without a crash. I've cleared and exported the crash logs from Event Viewer, and the fans are now steady at 1600-1800 RPM.
