Tutorial: How to build a Dual psu system using 1 Power on button

Dual PSU rig, using 1 Power on button

Setting up your system to run dual (Master/Slave) psu's is very simple.
What you need:
2 atx psu's (example: Matched 300w), electrical tape,
2 wire connectors and space in your case.

I chose to mount the slave PSU inside of case running
Link wire 14(green) & 15(black) inside to pair up with internal PSU 20 pin.

1. First thing to do is make sure that both psu's work.

2. Now locate the plugs that hook up to the motherboard on both psu's. (20 pin)

http://i42.photobucket.com/albums/e302/SOcRatEs120/My Rig/20pin.jpg

3. Identify Link wire 14(green) & 15(black) on both PSU's.
Cut the 20 pin plug off the slave psu. Now cut and cap (elec. tape)
remaining 20 pin wires (not the molex wires) all the way back to the slave PSU.

4.Then splicing wire 14(green) & 15(black)
to the master PSU wire 14(green) & 15(black).
note: Do Not cut plug off the master PSU

5. I cut only wire 14 & 15 on the master PSU about 1 1/2" from plug
and used wire connectors to make the following connections.

6. Link wire 15 (black) on both psu's together, line 15 is ground and to run
dual psu's you need a common ground.

http://i42.photobucket.com/albums/e302/SOcRatEs120/My Rig/casemodp3_6.jpg

7.Link wire 14 (green) on both psu's together, line 14 is the "ps-on" line
which turns the psu's on using just the Power on button of front of case.
Now your done with the master psu, the master psu is the supply that
mounts in your standard PSU spot and plugs into the motherboard.

I have used dedicated molex's from the master PSU to run my 6800 gt
and motherboard (20pin & 4pin Pentium) & HDD'S/ the slave PSU for
cdrw & dvdrw, internal fans & external radiator 120mm fan & cooling pump.

Note: this method only allows you to run two psu's in one case as separate
units, master/slave. The master PSU will supply the 4 pin plug to the
motherboard. I have since cut all un-used cables from the slave PSU ie;
20 pin & 4pin, mine had a weird 5 pin too.

http://i42.photobucket.com/albums/e302/SOcRatEs120/My Rig/SideFull.jpg

Really nice guide, I might use this in a build that needs like 1400w ( 2 700w PSUs ) for a DX10 build

I think that 5pin may be a SATA one (has extra orange wire??. I had one that fit straight into my sata2 drive, but it didnt actually do anything. I have used a second psu but never wired it to the one switch, great guide!!