PSU hack to always spin fans

TBlaar

TBlaar

New member
Hi all,

I have an ATX power supply and 3 8mm fans, and would like to use this in my biltong dryer!

The problem I am faced with is:
- The power supply is off when the power cable is in
- Crossing green and grey only gives the PSU a jolt of power, and it does not stay on permanently.
- This does not not spin the fans

I want to gippo this PSU so that plugging in the cable will give power to the fans, connected via normal molex connectors. I have seen many PSU modification threads, but they all involve adding terminals and soldering shit together. I want to have the PSU on, same way that your pc's power button turns this on and spins the fans connected to it.

Which wires do i cross, where do I put the on-off switch?

Thanks!
 
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pin 4 and 6 needs to connected of the psu to turn it on without a motherboard ...

exos35.jpg


hope that helps
 
I'd maybe open it and remove the current fan, replace it with one you can just plug into the mobo or something.
 
axxon i think you need to re read his post.

Weakest link answered your question. What id also suggest is buying a longer copper cable so that you can install it and cut the cable in 2 and put a switch inline so that you can turn it on and off.
 
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Thanks brews,

Alas, the weakest_link's gippo does not work... I am sure this always used to work back in the day???

I have tried a few PSUs which all definitely work... still no luck.

meh...
 
hmmmm that is strange ... it always worked for me. Tried it on zalman, corsair and seasonic.

you sure you connected the proper wires? pin 4 is green and pin 5 is black. This is usually the way most people who do water cooling setup will test their loop for leaks cause the power is needed for the pump and fans for the reservoir.
 
Yeah man, tried a few more PSUs here at work, all did the same thing. And these are working PSUs. I am sure this always used to work....

Back to the drawing board.
 
TBlaar said:
Yeah man, tried a few more PSUs here at work, all did the same thing. And these are working PSUs. I am sure this always used to work....

Back to the drawing board.
Click to expand...

ok i dont mean to sound sarcastic but was the plug at the wall switched on and the button on the psu if it had one? just covering all the basis since most of us forget the simplest of things
 
Hehe, yes to all the above. I thought I was doing something wrong, but this is what I tried...

Will try again, with another PSU at a different power source, using a new piece of wire to bridge these.

Thanks all.
 
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