How to fix the sluggish response on Noctua NH-D15S in Sims 5?
Clicking the mouse and waiting 0.5 seconds for a building component to actually appear is a nightmare that completely kills the creative mood. Checking the performance panel, the Noctua NH-D15S was running quiet, but the CPU cores were idling between 85-89℃, causing single-core clocks to jump erratically between 3.8GHz and 4.5GHz. I tried capping the maximum processor state to 99% in Windows, which brought temps down to 70℃ but made the rendering speed painfully slow—a complete fail. I realized I had to fix the physical airflow. I cranked up the front intake fans to 1200 RPM and switched the NH-D15S to Performance Mode. In AIDA64, the core temps quickly settled into the 68-73℃ range, and frequency swings dropped from 700MHz to just 150MHz. I spent way too long thinking the thermal paste had dried out, but re-applying it only gave me a 1℃ drop; it turned out my radiator fan was installed backward. Fan noise is now around 32-36 dB. Long-term rendering tests confirm the responsiveness is back and the bug is gone.
