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Dual-PSU - Any tips/advice/links-to-1500W PSUs?

post #1 of 18
Thread Starter 
In my quest to design a good future-proof PC (for an employer) I have hit a boundary; I can't seem to find any PSUs above 1200W.

So I've decided to strap 2 Corsair AX750 PSUs together, and was wondering, would this require case modding? Will the 2nd PSU (which will probably only be used to power 2 GTX580s) need to get some air-flow onto the fan? Could I mount it in some 5.25" bays (This particular case will have 4 free 5.25" bays), perhaps mounting it vertically?

Or can anyone provide me with a link to a 1500W PSU that the site will ship to Scotland?

Many thanks to those who reply with useful info.
post #2 of 18
I was going to suggest Newegg, but I don't know if they ship international.
post #3 of 18
I think having 2 PSUs would be a problem for you because of:
Heat
You would have to hotwire a PSU
Space
And why do you need 1500W? For SLI 580's I would just go for an 850 watter, 1200 as future-proof overkill.

But, if you really need a 1500W, look at the AX1500 or the SilverStone Strider 1500W
    
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post #4 of 18
Thread Starter 
Quote:
Originally Posted by Phantom_Dave View Post
I was going to suggest Newegg, but I don't know if they ship international.
They don't :/
post #5 of 18
Thread Starter 
Quote:
Originally Posted by Butter on Toast View Post
I think having 2 PSUs would be a problem for you because of:
Heat
You would have to hotwire a PSU
Space
And why do you need 1500W? For SLI 580's I would just go for an 850 watter, 1200 as future-proof overkill.

But, if you really need a 1500W, look at the AX1500 or the SilverStone Strider 1500W
I can't seem to find anywhere that sells them AND ships to Scotland.
post #6 of 18
you dont really need to hotwire the PSU...you can buy something like this :

http://www.frozencpu.com/products/56...ter_Cable.html

I am also planning to dual PSU my next rig, but that's because of 4-way sli.

frozenCPU can ship worldwide and they offer 1kW+ PSUs

http://www.frozencpu.com/cat/l3/g11/...0W_-Page1.html
Edited by iDaryl - 7/17/11 at 1:37pm
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post #7 of 18
1500w kingwin psu scan.uk

delivery info
Edited by CRosko42 - 7/17/11 at 1:39pm
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post #8 of 18
first of all you cannot just link up two PSUs and think youll be fine, you need to load the minor rails of both PSUs, that means ifyou hook up one into the motherboard and CPU, and then another for the GPUs' the one supplying the GPUs is only being loaded on its 12v rail, you need to load the 5v and 3.3v rails as well. The main PSU for the motherboard has its minor rails loaded by the board's peripherals, but the other doesn't.

Apart from that, some PSUs hate being hot wired, and their grounds might not be isolated/they might be just general connected to the case.

its not safe to do, of course I have done it, but it usually ends up with one PSU dieing early.

Can i ask why int he world do you need more than 1200 watts?

I cannot find a case where youd need a bigger PSU, FYI most 1250 watt PSus are able to supply 1250watts on their 12v rail alone, and then like 180watts on their minor rails.

PSUs are rated at continuous output, not peak, which I am guessing you are buying for.
Edited by Sin0822 - 7/17/11 at 8:48pm
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post #9 of 18
Thread Starter 
Quote:
Originally Posted by Sin0822 View Post
first of all you cannot just link up two PSUs and think youll be fine, you need to load the minor rails of both PSUs, that means ifyou hook up one into the motherboard and CPU, and then another for the GPUs' the one supplying the GPUs is only being loaded on its 12v rail, you need to load the 5v and 3.3v rails as well. The main PSU for the motherboard has its minor rails loaded by the board's peripherals, but the other doesn't.

Apart from that, some PSUs hate being hot wired, and their grounds might not be isolated/they might be just general connected to the case.

its not safe to do, of course I have done it, but it usually ends up with one PSU dieing early.

Can i ask why int he world do you need more than 1200 watts?

I cannot find a case where youd need a bigger PSU, FYI most 1250 watt PSus are able to supply 1250watts on their 12v rail alone, and then like 180watts on their minor rails.

PSUs are rated at continuous output, not peak, which I am guessing you are buying for.
I was planning on putting 2 GTX590's in, which bumped the bar up to around 1630W.
post #10 of 18
Quote:
Originally Posted by Z13 View Post
I was planning on putting 2 GTX590's in, which bumped the bar up to around 1630W.
No it didn't. You could EASILY run dual GTX590's off a quality 1050-1200w PSU. I'd lean more towards 1200w though, just because that's a LOT of money worth of GPU's.
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