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AX750 and 580 SLI? - Page 2

post #11 of 23
Thread Starter 
Quote:
Originally Posted by Skuloth;13044209 
AX750 is full modular tongue.gif get an 850 or 1200 and keep all your wires where they are and plug them into the new PSU should be relatively painless

I never thought of it if like that. Now if only I can find someone to buy my 750 tongue.gif
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post #12 of 23
The AX750 is enough:

http://www.guru3d.com/article/geforc...-sli-review/14

That's 719W from the wall.
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post #13 of 23
Quote:
Originally Posted by ABerd View Post
only a little more?

I'd probably not OC if I ran SLI since it should be enough power to run my games.

And 3 cards? I thought 2 was pushing it lol. Either way, my board only allows me to run 2 cards.
Too lazy too look up the numbers , But its not much more..
And my 570s at 1.15 vcore ( 960 core clock ) pull a hell of alot more power than stock 580s..
So I'm saying you will be fine with your 750 watt..
post #14 of 23
Quote:
Originally Posted by Blizzie View Post
3 cards is no go on a 750W
It could work.

AX750 pulling 900 watts w/near gold efficiency

Your computer won't be at 100% load(CPU and GPU) most of the time. You could get away with three GTX 580s provided you don't over clock them.
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post #15 of 23
On guru3D review, their power consumption was 719w off the wall.

With your PSU, its 90% eff. 719w *.90= 647w. Still have some room
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post #16 of 23
Thread Starter 
Quote:
Originally Posted by Capwn View Post
Too lazy too look up the numbers , But its not much more..
And my 570s at 1.15 vcore ( 960 core clock ) pull a hell of alot more power than stock 580s..
So I'm saying you will be fine with your 750 watt..
Awesome. Looks like I may just go SLI in the future then
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post #17 of 23
Quote:
Originally Posted by BizzareRide View Post
It could work.

AX750 pulling 900 watts w/near gold efficiency

Your computer won't be at 100% load(CPU and GPU) most of the time. You could get away with three GTX 580s provided you don't over clock them.
Does not matter.. its not rated for 900W and how long can it run at it 900W? Then account for processor, etc.

SLI 580 is the absolute max that the 750AX will run.
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Halcyon.Redefined
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post #18 of 23
Quote:
Originally Posted by BizzareRide View Post
It could work.

AX750 pulling 900 watts w/near gold efficiency

Your computer won't be at 100% load(CPU and GPU) most of the time. You could get away with three GTX 580s provided you don't over clock them.
The unit is meant to run at 750W continuously, not 900W. From that review, the 892W draw is from the wall, not taking efficiency into account, and was at its limit before shutting off. The reason why companies like Seasonic and Corsair underrate their units is so that they can guarantee you an actual true-label power rating, where if you happened to run 750W of equipment, the unit can take small fluctuations without powering off or killing something in the process.
     
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post #19 of 23
The 892W was the load that the system was pulling from the power supply. The point of the test is to show the Maximum power draw that can be pulled from the power supply before it shuts down. If that 892W were the power draw at the wall, then that would have meant that the AX750 is a horrible 750W continuous-rated unit because when taking about 85% efficiency into account, that would be about 758W. The AX750 is certainly capable of delivering more than 758W!

Besides, they managed to get 892W "out of it" before it shut down. That means they were talking about how much power the system was pulling from the power supply before their AX750 shut down. That means the AX750 was pulling about 1050W from the wall in order to deliver that 892W to the system before it shut down (that is, if it were 85% efficient).
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It's a computer!
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post #20 of 23
Quote:
Originally Posted by TwoCables View Post
The 892W was the load that the system was pulling from the power supply. The point of the test is to show the Maximum power draw that can be pulled from the power supply before it shuts down. If that 892W were the power draw at the wall, then that would have meant that the AX750 is a horrible 750W continuous-rated unit because when taking about 85% efficiency into account, that would be about 758W. The AX750 is certainly capable of delivering more than 758W!

Besides, they managed to get 892W "out of it" before it shut down. That means they were talking about how much power the system was pulling from the power supply before their AX750 shut down. That means the AX750 was pulling about 1050W from the wall in order to deliver that 892W to the system before it shut down (that is, if it were 85% efficient).
Thank you. I stand corrected.

However, the point remains that it would not be realistic to expect the AX-750 to perform as ~900W unit in dealing with Tri-SLI GTX 580's on a day to day basis.
     
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