How to stop Jonsbo CR-1400E thermal saturation in Returnal?
In the middle of a tense combat loop, I'd notice the game start dropping frames after about an hour. It was a slow slide in performance, but it felt terrible. My monitoring showed the Jonsbo CR-1400E fins were hitting thermal saturation, leaving the CPU hovering between 82-88℃ and triggering minor clock fluctuations. I tried limiting the CPU max state to 99% in Windows, which dropped temps by 3℃ but cost me about 10 FPS—I wasn't about to accept that trade-off. Instead, I cranked up the front intake fans to 1200 RPM and adjusted the cooler's fan curve to kick in earlier. Checking RivaTuner, the frame time variance shrank from 11-22ms down to 9-14ms. I dealt with some annoying turbulence noise at first, but swapping to low-noise fans fixed that. CPU full load is now 75-81℃. I ran a benchmark to verify the clocks are stable, and it passed. It's a small cooler, so you really have to push the case airflow.
