Timeline for Powering a 4-Pin stock CPU heatsink fan with an external power supply
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 4, 2015 at 20:06 | answer | added | KalleMP | timeline score: 1 | |
| Sep 3, 2015 at 15:46 | comment | added | APOLLO457 | I've had some feedback from others online that I should simply connect the PWM line to the 12V power source as well...thoughts? | |
| Sep 3, 2015 at 15:24 | comment | added | APOLLO457 | Roger Rowland - I am sure the PWM wire is not grounded as the wire is not stripped at all and is not connected to anything but the fan. I do like your thought about the start-up current exceeding the capacity of the power supply though...if that is the case will connecting a large capacitor to the circuit help? If so, how would I go about doing that...? | |
| Sep 3, 2015 at 15:18 | comment | added | Roger Rowland | I mean make sure that the PWM wire is not grounded. | |
| Sep 3, 2015 at 15:16 | comment | added | APOLLO457 | Arsenal - I am sure that I did not kill it with incorrect wiring, but not sure if the fan is still working properly. I hacked off the 4 pin connector all the way back to the connector to maximize the wire length connecting to the Power Supply I bought so I'm not sure how to go about reconnecting it to the MoBo header unless I go buy a pin puller or something... However, the fan has been sitting in the intel CPU box it came in for the last 3 years since I built my PC, so the only thing that could have killed it is maybe age? | |
| Sep 3, 2015 at 15:07 | comment | added | APOLLO457 | Roger Rowland - What do you mean by am I "sure it's not grounded?" Like am I sure i connected the ground wires? Or am I sure the power supply is working? The PS is new, and the little light on it comes on when it is plugged in. I don't have a volt meter or anything handy to measure anything, but I may need to take it over to my father's house to borrow his and test it. Any suggestions on what to test? | |
| Sep 3, 2015 at 14:26 | comment | added | Arsenal | Are you sure you haven't accidentally killed the fan? I've recently connected a fan in reverse (killing it) and afterwards it would show a quite similar behaviour as the one you describe. Can you connect the fan to a mainboard (there should be a chassis fan header or something) and try if it works there? | |
| Sep 3, 2015 at 14:22 | comment | added | Roger Rowland | The PWM line should be internally pulled up by the fan, so if you don't connect it, it should run at full speed. Are you sure it's not grounded? The PSU seems big enough and your wiring is correct but the fan may draw more than its rated 0.28A when it starts, so a big cap might help. | |
| Sep 3, 2015 at 14:17 | review | First posts | |||
| Sep 3, 2015 at 15:16 | |||||
| Sep 3, 2015 at 14:14 | comment | added | APOLLO457 | link 1: pavouk.org/hw/fan/en_fan4wire.html link 2: youtube.com/watch?v=1nA-uE_AogQ link 3: youtube.com/watch?v=gKHww3qJbs8 | |
| Sep 3, 2015 at 14:14 | history | asked | APOLLO457 | CC BY-SA 3.0 |