How do I fix severe frame time fluctuation in Judgment caused by Noctua NH-D9L fan speed instability?

Frame times jumped from 8ms to 35ms during group combat, making control precision impossible. I tried fixing fan speed in BIOS, which reduced noise but caused poor temperature control. I used GamePP Fan Curve Config to boost fan speed to 1500 RPM and set startup to 800 RPM. RivaTuner verified frame times converged to 7-10ms. Task Manager showed CPU usage stable at 60-68%. This verify process ensured smooth gameplay.