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Fans Stuck at 100%

Quarpet

Hey y’all I have a weird DTX board I am going to use to run a Minecraft server and for some reason both the cpu fan (PWM) and the chassis fan (DC) are stuck at 100% all the time. 
 

There is no fan control in the BIOS except for setting a target CPU temp? Neither Fan Control nor Speedfan could control the fans either just full bore all the time. 

Any solutions? I would update the bios but this board is super weird. I can’t even find the manufacturer, this is an old Newegg listing for it  
https://www.newegg.com/p/2S7-07JP-24KK5

 

I originally had an 80mm exhaust fan but it was so loud I switched to a single 120mm intake instead. The system is just an i5-2400 so nothing crazy just need some air flow. 
 

Any advice appreciated 

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5 minutes ago, Quarpet said:

Hey y’all I have a weird DTX board I am going to use to run a Minecraft server and for some reason both the cpu fan (PWM) and the chassis fan (DC) are stuck at 100% all the time. 
 

There is no fan control in the BIOS except for setting a target CPU temp? Neither Fan Control nor Speedfan could control the fans either just full bore all the time. 

Any solutions? I would update the bios but this board is super weird. I can’t even find the manufacturer, this is an old Newegg listing for it  
https://www.newegg.com/p/2S7-07JP-24KK5

 

I originally had an 80mm exhaust fan but it was so loud I switched to a single 120mm intake instead. The system is just an i5-2400 so nothing crazy just need some air flow. 
 

Any advice appreciated 

I suspect it has to do with the fan headers and the fans you're using.

 

3 pin fan headers are DC only control, where it'll adjust fan speed by lowering the DC voltage to them.

 

4 pin fan headers can do DC control (when set to that or a 3 pin fan is plugged in) and PWM control. PWM keeps the voltage at 100% but then uses the 4th pin to modulate that 12V to attenuate the speed. It effectively turns the fan off at certain increments to reduce the overall power to the fan, which reduces its RPM.

 

I'd confirm some of this information first to see if it lies in a hardware configuration issue before diving deep into the UEFI/BIOS.

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Builder/Enthusiast/Overclocker since 2012  //  Professional IT since 2017

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Get like an 800-1000 RPM 120mm fan, that should be low on noise. As for the cpu, the stock intel cooler and fan should be fine.

 

Do what @Agallsuggested first.

Gaming With a 4:3 CRT

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I'd advise ditching the platform entirely. It's ancient. 
If you're dead set on fixing it, you could use a fanhub of somesort, or even grafting a trimpot or just straight resistor into the power line

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On 4/15/2024 at 11:17 AM, OddOod said:

I'd advise ditching the platform entirely. It's ancient. 
If you're dead set on fixing it, you could use a fanhub of somesort, or even grafting a trimpot or just straight resistor into the power line

I know it's old, it was also very cheap and doing nothing so I was trying to give it a purpose. 

 

It not so much that it doesn't work, it was just loud, swapped out the fan for a 120mm and its much more tolerable now. The only thing holding me back now is Spectrum. For some god forsaken reason the computer will not show up in the spectrum app when connected through the onboard networking so there is no way to enable port forwarding with the spectrum router unless I install a wifi card. But that's a question for a different thread.

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