How to fix voltage instability on Soyo SY-Yanlong B550M?

The screen was jumping between 60 and 45 FPS, and that tearing was absolutely brutal during fast-paced stealth combat. Digging into the logs, I found the Soyo SY-Yanlong B550M's PBO auto-boost was way too aggressive, causing the CPU core voltage to bounce between 1.1V and 1.4V, which triggered those instant frame drops. My first instinct was to enable V-Sync in the driver panel, but that was a nightmare—it killed the tearing but pushed input lag over 40ms, making the controls feel like I was wading through mud. I went back into the BIOS, switched PBO to Manual, set a negative voltage offset of 0.05V, and disabled Global C-states to stop that wake-up latency. In RTSS, the frame time graph went from a jagged mess to a nearly flat line, staying between 16.1-16.8ms. I actually black-screened on the first try with the negative offset, so I had to dial it back to 0.02V to get it stable. CPU temps are now 68-74℃ and VRMs are at 55-61℃. An hour of OCCT stress testing showed zero crashes, with memory holding at 58-63℃.
Category:Troubleshooting Last updated:February 19, 2026 2:06 PM