Resident Evil 9 is stuttering during heavy fights with my Huntkey Blizzard T600. Should I tweak virtual memory?

Whenever a massive mutant appears, my FPS tanks from 100 to 40, which is incredibly frustrating. HWiNFO revealed that the Huntkey Blizzard T600's 12V rail was swinging wildly between 11.6V and 12.2V during 600W transients, triggering a brief GPU downclock. I tried enabling 'Ultimate Performance' mode in Windows, but that actually made the voltage swings worse—just a frustrating cycle of trial and error. I eventually went into the BIOS and set the Load-Line Calibration (LLC) to Medium and disabled C-State energy saving. This tightened the voltage range to 11.9-12.1V and smoothed out frame times to 10-14ms. The system had some weird boot delays after the first LLC change until I added a +0.02V offset. The PSU fan now hums along at 1100-1300 RPM. The transient drops are gone, but the BIOS menu for this board is a total maze.