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Can't control fans

radmanhs
By radmanhs
in Cooling
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I'm using an ASUS Maximus 8 gene (AI Suite 3) with a swiftech fan splitter to control 6 fans.  For some reason they all only run at max.  It worked perfectly, then I had to move. I reset the CMOS, but I changed everything back to pwm mode.  When you run the fan optimization, they still only run at max. I'm at a loss as to why they wont slow down.  Any ideas?

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is the fan port at pwm mode and the fans are not pwm, or vise versa

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Does the fan splitter support PWM?

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You have the splitter (I think I know the one you're talking about; it's 4-pin) connected to a 4 pin fan port on the mobo? The fans connected to the splitter have 4 pins and are PWM? If the previous two questions are yes, then look in the bios for the fan port; sometimes a 4-Pin fan port is set to like "voltage" rather than "PWM" (It should be PWM).

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Forgot to say the fans.  The port is pwm, and they are all Corsair pwm fans. Yes the splitter supports pwm, it all worked before I moved.  I'll take a look in the bios again, I think there was only pwm and DC options

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4 minutes ago, radmanhs said:

Forgot to say the fans.  The port is pwm, and they are all Corsair pwm fans. Yes the splitter supports pwm, it all worked before I moved.  I'll take a look in the bios again, I think there was only pwm and DC options

On top of that, (if the splitter is plugged into CPU_FAN port), check to see if your motherboard has an option to set the "CPU target temperature". If so, make sure that temperature is set to like "50 degrees", not "low as possible."

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I've changed the fan plugged in the primary sensor plug in the splitter 3 times, reset the cmos and started that fresh, no results. The AI Suite is sensing the rpms, but no change.

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