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Dual PSU Mod

post #1 of 27
Thread Starter 
Well, this is a mod that I used to have when I had two cheap generic PSUs. Whenever I connected more than 3 fans to my 450W (main) PSU, the machine showed BSODs. So I got the other 400W from the old stuffs, and hooked it up for powering the fans and lights. This is also known as paper-clip mod. Many of you might know this, but this tutorial might be helpful for newbies and people in the condition that I was in a year back.

All you need:
*1 ATX Power Supply (in this tutorial, I've used a PSU that comes with 20 pin ATX connector)
*1 metal paperclip [or gem clip]
*Pliers or any other thing for cutting the clip into two halves.

Step 1. Cut the paperclip into two halves and bend, you will get one half like this:

DSC06431.jpg

Step 2. Find out the two holes you will plug this pin into. You can find these beside the plastic lock that holds the plug with the female. Find the green wire and beside it a black ground wire. Here I skipped the middle hole between these two.

DSC06425.jpg

Step 3. Push the two ends of the paperclip into these holes so that they don't come out.

DSC06427.jpg

Then you will have something that looks like this:

DSC06428.jpg

Now where to put this?
In my mid-tower case, it was impossible to accommodate the second PSU, so I put that in the 5.25" cages. It took up two slots and all I had to do was just to bend the clips that usually hold the ODDs.

Done!
    
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post #2 of 27
lol done this today to power an old mtx 4 channel amp in my room dunno what the power supply is though but it seems to be doing its job
post #3 of 27
cool
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post #4 of 27
Could you attach some wires (instead of using the clip) to those 2 points and have them rigged into the pc power switch on the front of the pc case ????.

Dave.
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post #5 of 27
So this keeps the PSU always on? Do you then have it plugged into a power strip for your On/Off or just yank the plug?

Edit to add this that was posted while I typed:
Quote:
Originally Posted by spinal_chord;14339589 
Could you attach some wires (instead of using the clip) to those 2 points and have them rigged into the pc power switch on the front of the pc case ????.

Dave.
This is what I was getting at- is it possible to use the same switch as your other PSU(wired parralel)? Or will a short occur between the two?
Edited by Jagged_Steel - 7/25/11 at 9:32am
    
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post #6 of 27
Thread Starter 
Quote:
Originally Posted by spinal_chord;14339589 
Could you attach some wires (instead of using the clip) to those 2 points and have them rigged into the pc power switch on the front of the pc case ????.

Dave.
Yes I could.
Quote:
Originally Posted by Jagged_Steel;14339615 
So this keeps the PSU always on? Do you then have it plugged into a power strip for your On/Off or just yank the plug?

Edit to add this that was posted while I typed:

This is what I was getting at- is it possible to use the same switch as your other PSU? Or will a short occur between the two?

There is a switch behind the PSU, I use that.
    
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post #7 of 27
Quote:
Originally Posted by spinal_chord;14339589 
Could you attach some wires (instead of using the clip) to those 2 points and have them rigged into the pc power switch on the front of the pc case ????.

Dave.

you can cut those two wires and solder them onto the same wires on your main psu then they will power on at the same time using the front panel switch as usual.

My old coolermaster stacker had an adapter for doing just this thing if you google it. Found an adapter image from another thread http://www.overclock.net/computer-cases/69669-new-case-2.html:

dualpsuconnector8ll.jpg
Edited by staceyeliz - 7/25/11 at 9:38am
post #8 of 27
Wow, that is great stuff. I was actually pondering cobbling an old stereo amp/board into my case to eliminate one more box from my desk, and the main board is powered by a 20 pin connecter from a computer style PSU. I am going to have to see if the power on/off trigger wires are the same as a comp PSU. That would allow me to have it fire up and turn off with only one button when I power up/off the computer .

+ rep for both of you gentlemen.drunken.gif
    
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post #9 of 27
This is such a bad idea, its not even funny. You need to be supplying your computer with good CLEAN power. Generic PSU's can't do that, as you've already seen from the BSOD's. If you can't afford the $25-40 to buy a good 400w PSU to power your machine, then you really should rethink your priorities.

Generic PSU's are good for modding car equipment into the home though (they don't have much power though, so not so great for amplifiers). They're also great for quick testing of fans and lights and stuff.
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post #10 of 27
Quote:
Originally Posted by pioneerisloud;14346408 
This is such a bad idea, its not even funny. You need to be supplying your computer with good CLEAN power. Generic PSU's can't do that, as you've already seen from the BSOD's. If you can't afford the $25-40 to buy a good 400w PSU to power your machine, then you really should rethink your priorities.

Generic PSU's are good for modding car equipment into the home though (they don't have much power though, so not so great for amplifiers). They're also great for quick testing of fans and lights and stuff.

agreed, i recently picked up an Antec 520w High Current for $45 off newegg for my dns/file/Team Foundation Server

still $58 + 10% off
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371047
Edited by selectstriker2 - 7/25/11 at 6:59pm
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