How to fix CPU temp spikes with the RT620 ARGB in Dota 2?
The game felt incredibly choppy during heavy engagements, with frame times jumping erratically between 12-38ms. It was a nightmare for precision clicking. I traced it back to the PCCOOLER RT620 ARGB fans; in Auto mode, they were fighting with the motherboard's PWM signal, causing core temps to bounce between 65℃ and 82℃. My first instinct was to lock the fans at 100%, but the resulting resonance noise was so loud it leaked into my headset, which was just unbearable. I went back into the BIOS, switched the fan header mode from Auto to DC, and manually locked the voltage at 11V to keep the RPM constant. Checking RTSS, the CPU temp stabilized at 62-68℃ and frame intervals tightened to 10-14ms. I did have a moment of panic when the radiator fans stopped spinning briefly after the first voltage lock, but a quick reseat of the cable fixed it. The fans now hum along at 1300-1500 RPM, taking the pressure off the CPU. Three hours of testing confirmed the rendering lag is gone and RAM temps are steady at 58-63℃.
