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Undervolting CPU fan?

post #1 of 7
Thread Starter 
OK i have my PWM CPU Fan. Im powering the 12v lines off the mobo. But what happens if i plug the 12 lines into my fan controller and run at say 7v? will the PWM get messed up or will everything work fine just a bit quieter?
    
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post #2 of 7
Should work fine, just slower. Though I don't know why you would do that since you should be able to control speed through software.
post #3 of 7
Thread Starter 
Quote:
Originally Posted by audioxbliss View Post
Should work fine, just slower. Though I don't know why you would do that since you should be able to control speed through software.
Even the lowest speed is way to loud. It wont go lower than 1000rpms
    
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post #4 of 7
Operating with less than 12v will work for a while, but eventually the fan motor will fail. Why won't it go lower than 1000RPM?
post #5 of 7
Thread Starter 
Quote:
Originally Posted by gymenii View Post
Operating with less than 12v will work for a while, but eventually the fan motor will fail. Why won't it go lower than 1000RPM?
Its a massive 38mm fan. Nidec Beta V. Right now im at idle and its still 1700rpms.
    
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post #6 of 7
Quote:
Originally Posted by iCrap View Post
Its a massive 38mm fan. Nidec Beta V. Right now im at idle and its still 1700rpms.
From your previous thread, you have the Nidec PWM fan powered via molex from PSU and the PWM and RPM signals connected to the MB CPU_Fan header. If you set the CPU fan control to PWM or Auto in BIOS and use easytune to set the fan speed, you can set the fan duty cycle to the limits of the fan. Is this not working now?
post #7 of 7
Thread Starter 
Quote:
Originally Posted by gymenii View Post
From your previous thread, you have the Nidec PWM fan powered via molex from PSU and the PWM and RPM signals connected to the MB CPU_Fan header. If you set the CPU fan control to PWM or Auto in BIOS and use easytune to set the fan speed, you can set the fan duty cycle to the limits of the fan. Is this not working now?
It does work, but the lowest setting is still like 1700rpms.

edit: yea it dosent go below 1720rpms
    
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