But a PWM hub does not draw power from the GPU header, it has an external power source (SATA or Molex connector). Plugging in a single PWM fan or two PWM fans on a "Y" splitter cable work fine, since they are both being powered by the header. I don't understand it completely, but apparently the GPU PWN fan header requires sensing a power "load" to send correct PWM information to the fans. Unfortunately, PWM hubs don't work on the GPU fan header. So it makes sense for case fans to be tied to GPU temp more than anything else. I currently pull 400watts GPU board power draw with it OC'd. Since my CPU has an AIO radiator that is cooled by fresh air intake, the inside of my case temps really mainly affect my GPU once that ramps up under gaming load. I didn't think controlling GPU temp was possible outside of GPU-specific software, and I bought a 3080 FTW3 Ultra with hopes of using its PWM fan header connected to a PWM fan hub to control most of my intake/exhaust fans based on GPU temperature. I paid $10 for the personal use license after finding that it did exactly what I wanted it to. It does a lot of other things but this is why I tried it. Tl dr: Argus Monitor allows you to set custom fan curves based on basically any temperature sensor it has access to in your system, including GPU temp. Pick, Assemble and Install: Video Guide. ![]()
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