Can I plug a 3 pin fan into a CPU fan header?
- Thread starter Azrael47
- Start date
- Jun 1, 2013
- 1,629
- 0
- 20,460
Ok, at full speed (12v) the fans run at around 1000RPM so that isnt much of a concern. Sounds silly but what is the difference between a CPU fan header and a chassis fan header?
Is the CPU fan header just conveniently placed for a heatsink?
like i said the 4th pin is a pwm syncing pin. the extra pin sends a pulse pattern to the fan switching it off and on. the space between the pulses allows the fan to slow slightly so you increase the frequency the fan speeds up if you space them out the fan slows down...
1 thing you may notice if bios has pwm mode set and your not using pwm fans. you may get extra motor noise from the fans. to stop this just turn pwm mode off in bios.
1 thing you may notice if bios has pwm mode set and your not using pwm fans. you may get extra motor noise from the fans. to stop this just turn pwm mode off in bios.
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