So I have the CM Hyper 212 EVO and I arranged it in a push/pull configuration. One fan (push) is a 4-pin PWM and the other fan (pull) is just a standard 3-pin. My motherboard only has one CPU fan header (using the 4-pin fan on it), so I was wondering if I could put the 3-pin fan into a system fan header, so it would always run at it's highest RPM. Is this okay to do?
CPU Fan on a System Fan Header?
- Thread starter macleody
- Start date
- Nov 18, 2008
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If you connect it to the system header on the mb there may be an option in BIOS to change the speed .
Ubrales
Polypheme
- Dec 3, 2009
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If in doubt connect it and run it at a higher RPM than the push fan. Or else it will create an additional load on the push fan. The ideal situation would be to run the pull fan about 5% faster than the push fan.
The motherboard fan headers do provide control in the BIOS via "IF - THEN" statements. If this method is used, the CFM rule should be maintained.
The motherboard fan headers do provide control in the BIOS via "IF - THEN" statements. If this method is used, the CFM rule should be maintained.
- Nov 18, 2008
- 20,307
- 4
- 74,960
what happens if you make the fixed speed fan the "push"fan and the pwm variable speed fan the "pull"fan?
Ubrales
Polypheme
- Dec 3, 2009
- 13,240
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That configuration will work, and it will cause undue stress if the CFMs are not balanced (or close to each other).
I have the Hyper 212 EVO on my i7 3770K (2 weeks old) and the temps are around 30 degs C on one push fan. I did buy a second fan for a pull; may or may not install it.
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