Tech Support Forum - View Single Post

**TheMatt** · 09-04-2007, 03:45 PM

If your board also has the 4-pin connector (and the 4th pin isn't just hanging off), then *theoretically* cutting the PWM wire (usually blue) will make the fan go up to 100%. It really depends on the BIOS though.

Another option is to get a 3-pin to 4-pin adapter and plug the CPU fan into the power supply, but your system might not start saying CPU fan failure. A way to get around this (when using this solution) is to connect the +12v pin and the GND pin with a resistor (around 100 ohms would be sufficient). This will make the board think there is a fan connected when there is really a resistor.

You might also have to do something with the other pin where the sensor wire would be connected. I will have to investigate that further if you go that route.

09-04-2007, 03:45 PM	#286 (permalink)
TheMatt Moderator, Hardware Team Join Date: May 2006 Location: Boston Posts: 13,695 OS: Win 3.1, 98, NT 4.0, XP Debian 4.0, Kubuntu 6.06 My System Blog Entries: 3	Re: lets see your rig If your board also has the 4-pin connector (and the 4th pin isn't just hanging off), then theoretically cutting the PWM wire (usually blue) will make the fan go up to 100%. It really depends on the BIOS though. Another option is to get a 3-pin to 4-pin adapter and plug the CPU fan into the power supply, but your system might not start saying CPU fan failure. A way to get around this (when using this solution) is to connect the +12v pin and the GND pin with a resistor (around 100 ohms would be sufficient). This will make the board think there is a fan connected when there is really a resistor. You might also have to do something with the other pin where the sensor wire would be connected. I will have to investigate that further if you go that route. __________________ - Matt M - KB1OSC - Folding@Home 85015 If TSF has helped you, please consider donating. If I have stopped responding to a thread, feel free to send me a PM with a link to the thread. It is advisable to subscribe to threads so you will receive updates when replies are posted. You can subscribe to threads from the "Thread Tools" Menu. »Memtest86 »Prime95 »UBCD »SpeedFan »NHC Personal »Everest »Sandra »PC Wizard »RivaTuner »ATi Tool Click here for Useful Articles and Guides Last edited by TheMatt : 09-04-2007 at 03:50 PM.