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One computer 2 Power Supplies?

D

DAM

Diamond Member
Well I have an old Dell 125W PS and a Compaq 250W PS can I use them both to run my old Celeron proc and mobo? with one CD rom/Floppie/HD? Should I expect any problems? would one PS be enough?


Thanks,

dam()
 
Maybe. I have been meaning to try it out, but have not had a chance. For it to work at all, it would have to be the same wattage PWS.

You can set it up so that the smaller pws turns on with the other. The larger one can power the mainboard, the other can power all the drives.

<edit>
What I mean about "trying it out" is splicing all the conectors to the mainboard together from the 2 PWS's. I am just worried about the current not being consistant though both pws's.
 
i run two psus in my rig.

i have 350w enhance + 300w deer.

you can link the green wires together to have them boot together.

i have 4 HD's, 2 CDroms, floppy in my rig...
not to mention 6 case fans...
so i power all these with deer 300w...

and my mobo with 350w.

not that this really gives much benefit...
but i have it set up as such... 'cause i can. 😉
 
Originally posted by: aphexII
How would you turn that thing on and off though?
Click to expand...

There are 2 ways. The one I used was a manual switch. Just set up a switch between the single green wire on the ATX milex conector and ground.

If you do not want the manual way, you can connect the green wire from the PWS powering the drives to the green wire from the other pws. ( green wire is the sensing wire. It must be connected to ground for the pws to power on. )
 
Originally posted by: zzzz
One ps should be enough. But you should really post it into appropriate forum.
Click to expand...




You are aboslutely correct however the responce time of the other forums is horrific compared to this one.


Thanks for all the resonponces I will try it at home and see what happens.


dam()
 
Careful with that Dell PSU. Some of the ATX ones have different pin configurations on the motherboard connector than standard ATX PSUs and can fry non-Dell motherboards.
 
Originally posted by: werk
Careful with that Dell PSU. Some of the ATX ones have different pin configurations on the motherboard connector than standard ATX PSUs and can fry non-Dell motherboards.
Click to expand...

I totally forgot baout that. You are correct. Try to get a pin-out from dell. Look for the "power_on" pin. Short that to ground.
 
Originally posted by: DAM
Originally posted by: zzzz
One ps should be enough. But you should really post it into appropriate forum.
Click to expand...




You are aboslutely correct however the responce time of the other forums is horrific compared to this one.


Thanks for all the resonponces I will try it at home and see what happens.


dam()
Click to expand...

for your purpse... one should most definately be enough.
celly doesn't suck up as much power as Athlons.
and for 3 peripherals... it shouldn't be a problem... for 250w to handle.

besides satisfying your curiosity... what other benefit do you see in going 2 PSU in your rig?
 
Ok here is what I am planning:

Com: 200 W
Dell 150 W

The Com PS has a green wire on the P1 connector, I will use this PS to power the mobo. Then use the other PS to power the drives, however the Dell PS does not have a green wire, but two blacks. Are you guys talking about connecting the Green and this Black wire together?



dam(thanks)
 
Originally posted by: hoihtah
Originally posted by: DAM
Originally posted by: zzzz
One ps should be enough. But you should really post it into appropriate forum.
Click to expand...




You are aboslutely correct however the responce time of the other forums is horrific compared to this one.


Thanks for all the resonponces I will try it at home and see what happens.


dam()
Click to expand...



besides satisfying your curiosity... what other benefit do you see in going 2 PSU in your rig?
Click to expand...



just that, satisfying my curiousity :---)


dam()
 
Originally posted by: DAM
Ok here is what I am planning:

Com: 200 W
Dell 150 W

The Com PS has a green wire on the P1 connector, I will use this PS to power the mobo. Then use the other PS to power the drives, however the Dell PS does not have a green wire, but two blacks. Are you guys talking about connecting the Green and this Black wire together?



dam(thanks)
Click to expand...

black is the ground.

if dell is using a different color scheme...
you should get the pin-out... before doing anything.
 
Here is an article about the non-standard Dell PSUs. It includes rudimentary pinout charts. It says that ATX PSUs in machines purchased on or after 9/98 are non-standard. HTH.

EDIT: LOL, looks like we both did the same Google search, DAM.
 
it looks like gray is PS_on.

try connecting gray and any black wire together.

this should turn the psu fan on.
if so... that's your green wire.
 
ok im confused:

Gray on Dell = PS_On

I should wire that to Green on Compaq? or to black on Compaq?



dam()
 
Originally posted by: Evadman
Wire that grey to the green on the other.
Click to expand...

i dont' think that by itself will work.
you need to match up a grounds as well.

dam...
if i were you... i'd play safe...
and make a dual turn on system.
rather than having to rewire...
since you seem a bit new to it.

it'll just be a bit of hassle... since you'd have to turn on the PSU... that 's supplying power to peripherals before turning the MOBO one on.
but once it's on, it's all good.
 
one more thing...
i don't want to insult your intelligence...

but for others that might be reading this...
i'd say it.

when you're using a 125W psu for peripherals only...
it doesn't mean that all 125W is going to go to these peripherals.

most peripherals use 12V.

MOBO uses 3.3 & 5V.

each voltage line has it's own power rating.
so... you'll only be using that particular voltage's wattage.

so let's say you have two 300w psu.

you're not giving 300W to MOBO and 300W to Peripherals.
rather... you're giving 3.3+5v portion of first PSU to MOBO...
and 12v portion of second PSU to peripherals.

at the end... there's a lot of power waste.
 
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