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Motherboard does not detect Fan controller as PWM output.

Shadow01
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My Pc has the H97 Pro Gamer installed. Due to a lack of Fan Headers, I recently bought this Fan Controller: https://www.amazon.de/gp/product/B077YHLDSP/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I plugged in the power and the fans as well as the pwm port to the cpu fan port, and in the Bios it works like a charm. But when I boot into Windows, it seems like it doesn't detect the Thing as a Fan, therefore sending either nothing or 100% as PWM, because the Fans are on full Speed the whole time. What could be done to combat this ? All Fans are 4 pin headers.

Thanks in advance.

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After restarting 3 times it works now lol.

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