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h170m-itx/ac - PWM fan stop being recognized |
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pdlp 
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Joined: 10 Apr 2016 Status: Offline Points: 4 |
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 Topic: h170m-itx/ac - PWM fan stop being recognizedPosted: 10 Apr 2016 at 4:19am |
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Hi
I have a h170m-itx/ac motherboard. From one moment to the other my PWM fan (bequiet silent wing 2) stop working. I change to a non pwm fan and it didn't work to, update the bios and nothing. Then i decide to clear the cmos. What happen? The non pwm fan start working bu the pwm fan still not working. What could be the problem? Edited by pdlp - 12 Apr 2016 at 4:54am |
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parsec
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Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Posted: 10 Apr 2016 at 2:00pm |
The PWM bequiet Silent Wing 2 fan is connected to which of the two fan connectors on your board? Is it on the CPU Fan connector, or on the Chassis Fan connector? Did you put the non-PWM fan on the same fan connector as the PWM fan? Have you done any configuration of the fan speed and temperature monitoring in the H/W Monitoring screen in the BIOS? If you have not, the default settings are not working right with your fans and where you have them connected. If you have the PWM Silent Wing 2 fan connected to the Chassis Fan connector, that connector is set by default to monitor the mother board temperature. The Chassis Fan can be set to monitor the CPU temperature, or mother board temperature. The CPU temperature changes more often and can be much higher than the mother board temperature will ever be. The default fan speed profile for the Chassis Fan connector is called Standard. This profile does not speed up a fan until the temperature being monitored is above 40 - 50C. My guess is you had the PWM fan on the Chassis Fan connector, which was set to monitor the mother board temperature, and using the Standard fan speed profile. That would explain why it would hardly spin, or stop. Your board's BIOS has a very nice feature called FanTastic Tuning, in the H/W Monitoring screen. You can set a fan's speed for five different temperatures, and create a nice graph or curve of the fan's speed change with temperature. The default, pre-defined profiles are programmed for quiet operation of fans. You really need to configure how you want your fans to operate in the BIOS, unless you just want them to run at full speed all the time. You might as well just connect them to the PSU if that's what you want to do. You can set the fans to run as full speed in the BIOS too. |
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pdlp
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Joined: 10 Apr 2016 Status: Offline Points: 4 |
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Posted: 10 Apr 2016 at 8:45pm |
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Well, i was not very precise.
When i said it stop working, the truth is that the fan is no longer recognized. Both (PWM and non PWM) stop being recognized. After the clear cmos only the non pwm is recognized. parsec I understnad all the facts you write. But, since the fan is not even recognized, none of them is a problem. I tried a new PWM fan and it isnt't recognized too.
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pdlp wrote: