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DanTheGamer11

Use PSU with out Computer

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Hiya guys just wanna use my 400w/350w psu to power a couple of fans without a mobo, i heard something about cutting the green wire and a black wire and sticking em together with some tape... gonna do this so i can put my fairly loud xbox into a closet or a cardboard box so it won't be as load as now...stupid fans too loud...

 

the cable you apparantly cut is the 20 pin atx but mine has 24 :P

Edited by Dan The Gamer

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Hiya guys just wanna use my 400w/350w psu to power a couple of fans without a mobo, i heard something about cutting the green wire and a black wire and sticking em together with some tape... gonna do this so i can put my fairly loud xbox into a closet or a cardboard box so it won't be as load as now...stupid fans too loud...

 

the cable you apparantly cut is the 20 pin atx but mine has 24 :P

 

you don't need to cut wires if you don't want to. Get a paper clip and insert one end into the single green wire slot. The other end stick into any of the black wire slots(these are grounds). This emulates the power on signal from the mobo to the psu.

 

-Trop

Edited by TropicalPreist

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you don't need to cut wires if you don't want to. Get a paper clip and insert one end into the single green wire slot. The other end stick into any of the black wire slots(these are grounds). This emulates the power on signal from the mobo to the psu.

 

-Trop

 

so will this work with a psu with no switch? do i just have to apply a load?

Thanks for quick response matE!

 

wow i just searched and found out i have no paper clip :lol:

any household alternativeS?

could i use a copper wire thats insulated instead?

Edited by Dan The Gamer

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yup but make sure the PSU isn't pluged in when you insert the wire

 

Eh, 12v is as safe as it gets. I have done it countless times and I haven't even come close to getting a zap.

 

If you want to get fancy you could hoot the wires together via toggle switch.

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Electrical shock is from current going through the body not the voltage. Use any conductive wire available just make sure to tape it to insulate it to protect yourself and the components. Tape it to ensure the jumper does not come loose too.

 

I use the ATX power supply to test different fan setups and I shut off the power switch then jumper pin 7 blk gnd and pin 8 green power good next connect the components and put the switch on.

 

The AT power supply (does not have a switch) will need a jumper on the blk and brn and then another on the wht and blue of the blk cable with these four coloured wires only. With this ps make sure to disconnect the power cord when making all connections.

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Low voltage DC electric shocks often go unnoticed or worst case cause a slight tingling. To cause any real damage, upset the heart rhythm for example, you need about 0.5A of DC current to flow (about 0.05A for AC I think) and 12V just ain't going to be enough. I test power supplies all the time and touch the rails often and don't even feel it. The impedance of the human body varies with voltage but taking a not unreasonable figure of 2K ohm it would need (V=IR) 0.5 x 2000=1000VDC to cause 0.5A to flow. I've generalized here a little but as you can see 12VDC is totally harmless.

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thanks guys for the help! used some copper wire thats insulated so i stripped around 1cm off and put it into the 'lil metal thing but i didn't have electrical tape so i just used normal and put both ends at a bigger distance so it doesn't spark :)

it's pretty nice to know these things and the weather just got hot! :lol:

 

Thanks all and maybe somebody else might look here for help!

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