2 PSU in one computer?

[chrisbard]

I have one PSU 500 and I want to add a second PSU 300W to my rig to manage the fans and neons, is this possible? Is it worth the trouble? Thanks

[Favu]

It can be easily done

I found the following tutorial on my hard drive :

(I have no idea when/where I got it from )

[WonderBread]

Originally Posted by Favu

It can be easily done

I found the following tutorial on my hard drive :

(I have no idea when/where I got it from )

you probably got it from the post i made along time ago asking the same question and yes it its possible Chris, it works quite well once you get your wire management right with the exta PSU in the case

[Favu]

Originally Posted by WonderBread

you probably got it from the post i made along time ago asking the same question

Wow, seriously? I must have saved it for some reason .... wierd stuff!

I am going to have to try and find your post now

[Staz]

Geez Chrisbard. With all the threads you necro you never found this:

Poor man's solution - Adding power to your Power Supply!



Edit: Opps, wrong thread. But I know I have seen the very same thing Favu posted done on here explaining the green + black wire mod.

[membreya]

Originally Posted by Staz

Geez Chrisbard. With all the threads you necro you never found this:

Poor man's solution - Adding power to your Power Supply!

He only necros threads that are no longer relevant and help noone

[Aedan]

Yes, it's possible - "option 3" in the picture is probably the most robust, if you don't mind breaking in. That ensures that both PSUs power up when the motherboard requests it. It's probably worth ensuring that the grounds are tied together at some point, just to ensure there's no difference of potential. It shouldn't happen, but I'm sure there's a cheapo PSU manufacturer out there who doesn't care.

[Staz]

Can't you just run a jumper wire from green wire to green wire and then one of the black wires to one of the blacks???

[Aedan]

Yes, although if there's a number of interconnects it might be better to run more than just one of the black wires together. It /should/ be grounded via the chassis anyhow, but...

[WonderBread]

Originally Posted by Staz

Can't you just run a jumper wire from green wire to green wire and then one of the black wires to one of the blacks???

thats what i did for about 4 months until i purchased a better PSU, worked great and there was never any problems.

i found the original thread, http://www.aoaforums.com/forum/case-...28881-psu.html

[MONKEYMAN]

Just make sure you dont let then interact, for example dont power your motherboard with one PSU and use the other to power your graphics card, it DOES work but seriously upsets the pc after a while because of the cross feed between the two PSUs.

[Staz]

But would there be any issues with using one for your MoBo and GFX card and the other for your optical drives and fans and any lighting? And which does the HDD go on?

[Rondog]

Originally Posted by Staz

But would there be any issues with using one for your MoBo and GFX card and the other for your optical drives and fans and any lighting? And which does the HDD go on?

Doesnt matter. As long as both PSU's start simultaneously. By joining the green wires on both, and a black wire from each. Both will start at the same time. PC components dont care where they get power.

[aghastpumpkin]

Originally Posted by Favu

It can be easily done

I found the following tutorial on my hard drive :

(I have no idea when/where I got it from )

PC Extreme, Issue 22, 2004?

[Favu]

Originally Posted by aghastpumpkin

PC Extreme, Issue 22, 2004?

Haha, that would make sense, only I don't own PC Extreme, Issue 22, from 2004 and I don't have a scanner

[cloasters]

Kicking myself because after five years I finally tossed two 250W AT power supplies I'd saved for good luck. Would have come in handy in a box that might be leaning on it's ATX PSU a little too hard.

[xmetrix]

Another method you could do is use an old school power supply with the push button toggle to switch it on, then use some small relay to hit the power on your other psu. That's what I did.

Took a 250 watt power supply, rigged the switch on my case to the toggle switch of the 250watter, then I had a little circuit that would short the atx power supply when it received power. I dont remember what kind of IC it was but it had a delay so it would wait x seconds before kicking on the second power supply.

[madcatmk3]

http://www.coolpc.com.au/catalog/pro...roducts_id=630

[Rondog]

YAY for an Australian site!!

Anyway, how does one rig an AT power supply to start as soon as it has power. Eg: take out the switch.

[bonesaw]

i wondered if you could have 2 psu's ??? where would you hind it?