[pete21]

hi everyone

i'm building my own case soon out of perspex and i want to use 2 psu one for the pc components and the other one say 150watts to run all fans watercooling and lcd displays etc as the case is going to be big and on the front of the case is going to be 2 140mm fans as i like to do something different

only problem is how would i get both psu's to tern on at the same time?

if eneyone nows could you let me no please
i could hotwire them write?

i will post again soon when i'm building the case with pics

[Giga095]

Hi pete21
Im no expert but from what ive read - opening up and messing with psu's is risky.
Dont wish to doubt your expertise but i would approach with caution.
Surely a simple splice connection at start button is best option. Or maybe a bigger single PSU (1000W) leaving more room and would mean less heat and noise.

Let me know how you got on as it sounds ambitious.

Giga095

[Jimmy Hat]

Here you go. From 'outonanisland' from the Overclockers Australia Forums-

ive successfully done this mod before, take the green and black wires from your secondary psu (google psu hotwiring if your not sure which wires) and then take your primary psu that plugs into your mobo, get a lighter and melt some of the plastic coating off the green and black wires (same wires as before) and splice in the secondary psu black and green wires, tape it all up good and proper, hit the power button on your pc and she should fire up.

if it at first it doesnt power up, check that the switch on the back of both psu's is set to on.

[serverguy]

http://www.computer-juice.com/forums...omputer-17317/

Half way down that thread is a link to a tutorial doing just what you want to do.

Edit:: No, thats silly. I just tried to point you towards your own website...

What don't you know how to do? You seem to know a bit about PSUs?

[serverguy]

Another thing I would suggest is that you make sure that at least the CPU cooler and critical fans are on the same power supply as the core components (processor).

That way, if one PSU dies, at least the CPU won't get stewed.

[pete21]

thats on how to hotwire a psu not how to get 2 psu to run at the same time with one switch

Originally Posted by serverguy http://www.computer-juice.com/forums...omputer-17317/ Half way down that thread is a link to a tutorial doing just what you want to do. Edit:: No, thats silly. I just tried to point you towards your own website... What don't you know how to do? You seem to know a bit about PSUs?

[pete21]

and thanks for that
i o how to wotwire and will do the below

Originally Posted by Jimmy Hat Here you go. From 'outonanisland' from the Overclockers Australia Forums- ive successfully done this mod before, take the green and black wires from your secondary psu (google psu hotwiring if your not sure which wires) and then take your primary psu that plugs into your mobo, get a lighter and melt some of the plastic coating off the green and black wires (same wires as before) and splice in the secondary psu black and green wires, tape it all up good and proper, hit the power button on your pc and she should fire up. if it at first it doesnt power up, check that the switch on the back of both psu's is set to on.

[thingie2]

Well it's basicly the same thing, I think, if you connect the power on pins together, when one gets grounded by the motherboard (telling the PSU to turn on) the otherone will be grounded too, causeing that one to be turned on aswell. But if you do it like that, don't have those idvervidual cuircuit breakers connected driectly to those plugs, as it would set them off even though there is nothing wrong.

[serverguy]

But if you do it like that, don't have those idvervidual cuircuit breakers connected driectly to those plugs, as it would set them off even though there is nothing wrong.

What do you mean by that? Its only like turning two PCs on at the same time...

[thingie2]

because the way I was saying was only using 1 ground (from only 1 PSU) as the circuit breakers detect any difference between the live and neutral cables, each one will have a slight difference.

[serverguy]

Originally Posted by thingie2 because the way I was saying was only using 1 ground (from only 1 PSU) as the circuit breakers detect any difference between the live and neutral cables, each one will have a slight difference.

The low voltage side of the PSU is isolated from the mains side by nature of the transformer.

The PSU will not be worried where it gets the +5v (I think thats the voltage) to signal it to turn on from. Ground is ground.

I know what you're saying but I don't think it will be a problem.

[thingie2]

there might not be, as it would be such a small difference, but I don't think anyone uses them there anyway. So in all, just forget what I said, I was just tring to make a cleaver remark