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Old 23rd Jul 2008, 07:04 AM
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Default 2 psu in one case?

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
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  #2  
Old 23rd Jul 2008, 08:04 AM
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Default 2 psu in one case?

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.

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  #3  
Old 23rd Jul 2008, 11:39 AM
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Default 2 psu in one case?

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.

Last edited by Jimmy Hat : 23rd Jul 2008 at 11:40 AM.
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Old 24th Jul 2008, 05:35 AM
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Default 2 psu in one case?

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?
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Last edited by serverguy : 24th Jul 2008 at 05:38 AM.
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  #5  
Old 24th Jul 2008, 05:39 AM
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Default 2 psu in one case?

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.
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Asus P5Q Pro
RAM:
OCZ 8GB 800Mhz
Graphics Card(s):
Saphire Radeon 4850
Sound Card:
Onboard
Hard Drive(s):
Vast
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Case / PSU:
Antec Three Hundred
Cooling:
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Old 3rd Aug 2008, 01:50 PM
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Default 2 psu in one case?

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 View Post
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?
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My System: V*I*K*K*I

CPU(s):
2GhZ AmD
Motherboard:
k75a pro -alite 5.0
RAM:
2 gig ddr
Graphics Card(s):
256mb G-force
Sound Card:
sound Blaster 5.1
Hard Drive(s):
1-80gb 1-120gb western digitals
Optical Drive(s):
pioneer's DVD-RW
Case / PSU:
400w
Cooling:
diy watercooling
Network / Internet:
virgine 20megg
Monitor(s):
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  #7  
Old 3rd Aug 2008, 01:51 PM
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Default 2 psu in one case?

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

Originally Posted by Jimmy Hat View Post
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.
__________________
__________________

My System: V*I*K*K*I

CPU(s):
2GhZ AmD
Motherboard:
k75a pro -alite 5.0
RAM:
2 gig ddr
Graphics Card(s):
256mb G-force
Sound Card:
sound Blaster 5.1
Hard Drive(s):
1-80gb 1-120gb western digitals
Optical Drive(s):
pioneer's DVD-RW
Case / PSU:
400w
Cooling:
diy watercooling
Network / Internet:
virgine 20megg
Monitor(s):
2-17inch
Operating System(s):
xp pro sp3 vista theme

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  #8  
Old 3rd Aug 2008, 01:56 PM
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Default 2 psu in one case?

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.
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  #9  
Old 3rd Aug 2008, 02:50 PM
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Default 2 psu in one case?

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...
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CPU(s):
Intel C2D E7200 OC'd @ 3.6Ghz
Motherboard:
Asus P5Q Pro
RAM:
OCZ 8GB 800Mhz
Graphics Card(s):
Saphire Radeon 4850
Sound Card:
Onboard
Hard Drive(s):
Vast
Optical Drive(s):
Sony al cheapo one.
Case / PSU:
Antec Three Hundred
Cooling:
Arctic Cooler 7 Pro, 3 case fans.
Network / Internet:
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  #10  
Old 3rd Aug 2008, 10:12 PM
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Default 2 psu in one case?

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.
__________________

My System: First OC

CPU(s):
Intel E2180 @ 2.85
Motherboard:
Gigabyte GA-P35-DS3L
RAM:
2x1GB OCZ PC2-9200 reaper CL5
Graphics Card(s):
Gainward ATI 3850
Sound Card:
on board
Hard Drive(s):
Seagate Barracuda 7200.7 120GB
Optical Drive(s):
HITACHI DVD-ROM GD-2500
Case / PSU:
Corsair VX450
Cooling:
AC freezer7 Pro, 2x80mm, 1x90mm, 1x120mm
Network / Internet:
on board / supposedly 10Meg virgin cable
Monitor(s):
Viewsonic Vx922; Viewsonic VE702m
Operating System(s):
XP Home

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  #11  
Old 4th Aug 2008, 01:03 AM
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Default 2 psu in one case?

Originally Posted by thingie2 View Post
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.
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My System: Eclipse

CPU(s):
Intel C2D E7200 OC'd @ 3.6Ghz
Motherboard:
Asus P5Q Pro
RAM:
OCZ 8GB 800Mhz
Graphics Card(s):
Saphire Radeon 4850
Sound Card:
Onboard
Hard Drive(s):
Vast
Optical Drive(s):
Sony al cheapo one.
Case / PSU:
Antec Three Hundred
Cooling:
Arctic Cooler 7 Pro, 3 case fans.
Network / Internet:
Titan ADSL
Monitor(s):
Dual 19" LCD
Operating System(s):
XP SP3

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  #12  
Old 4th Aug 2008, 09:14 AM
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Default 2 psu in one case?

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
__________________

My System: First OC

CPU(s):
Intel E2180 @ 2.85
Motherboard:
Gigabyte GA-P35-DS3L
RAM:
2x1GB OCZ PC2-9200 reaper CL5
Graphics Card(s):
Gainward ATI 3850
Sound Card:
on board
Hard Drive(s):
Seagate Barracuda 7200.7 120GB
Optical Drive(s):
HITACHI DVD-ROM GD-2500
Case / PSU:
Corsair VX450
Cooling:
AC freezer7 Pro, 2x80mm, 1x90mm, 1x120mm
Network / Internet:
on board / supposedly 10Meg virgin cable
Monitor(s):
Viewsonic Vx922; Viewsonic VE702m
Operating System(s):
XP Home

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