Fixing Noctua NH-D15 G2 fan response in PlanetSide
That sudden roar of fans in a quiet scene was absolutely grating, so I decided to dig into the response logic. While the Noctua NH-D15 G2 is a beast for cooling, the default fan response is way too twitchy. My CPU temps were bouncing between 40℃ and 60℃, and these rapid voltage fluctuations were actually causing micro-stutters in the system. At first, I tried setting a constant fan speed in the BIOS, but then the noise was constant even at low loads, killing the whole 'silent' vibe of the build. I eventually went into the advanced settings and bumped the fan step-up time from 0.1s to 2.0s, while adding a 5℃ temperature hysteresis zone. Checking the logs, the temp curve went from a jagged mess to a smooth wave, staying between 48-54℃. I actually overshot the lag time at first, which let the CPU hit 80℃ before the fans kicked in, so I dialed it back to 1.5s for the sweet spot. CPU power draw is now steady at 60-80W, and memory temps are holding at 58-63℃.
