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post #21 of 44
I think the op is only using 700 watts(@ killawatt) because his system is not overclocked. Once those GTX 580's and the AMD 8120 get overvolted they will become little piggies.


Quote:
I have reason to believe that my current PSU would be greatly insufficient for these purposes(I think I run about 700 W from the wall on load right now with only the 8120 @ 4 ghz and the 2 GPU's at stock
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post #22 of 44
Quote:
Originally Posted by TwoCables View Post

His system is only pulling 700W from the wall with two 580s in it. That's about 595W being pulled from the PSU. Adding a 3rd GTX 580 will be nothing.

his cards aren't OC'ed. I am asking for myself, if I would get 2nd 580
post #23 of 44
If you buy a new PSU I'd go with either the NZXT HALE90 V2 1200 for $222 shipped with promo code or the FSP AU1200-PRO for $220.

That's a ton of wattage consumption to not have a very efficient, high end PSU. Sure, you may not draw 1000w from the PSU if regular gaming.. but say you fold? You will.

so... start folding biggrin.gif
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post #24 of 44
Also keep in mind the efficiency of your PSU.. the closer you get to it's peak wattage the less efficient it becomes. and depending on the quality can cause unwanted effects... This is the reason I'm running my SLI'd 580's off a 1200w psu.. overkill.. perhaps.. but it's efficient when it comes to power consumption vs energy loss via heat. plus I also have room to add more in the future if I feel like doing so.
Edited by Ardalista - 3/24/13 at 4:12pm
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post #25 of 44
Quote:
Originally Posted by Ardalista View Post

Also keep in mind the efficiency of your PSU.. the closer you get to it's peak wattage the less efficient it becomes. and depending on the quality can cause unwanted effects... This is the reason I'm rtunning my SLI'd 580's off a 1200w psu.. overkill.. perhaps.. but it's efficient when it comes to power consumption vs energy loss via heat. plus I also have room to add more in the future if I feel like doing so.

 

Here's more information for anyone who wants to see the "nitty gritty" details:

 

On PSU Efficiency

 

PSU "50% Load" Myth

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post #26 of 44
Thread Starter 
Thanks so much for all the additional input and suggestions!

I'll try putting in the 3rd card with the 950 and seeing what happens.

I'll likely need to upgrade if/when I OC the cards and really push the 950 though.

Sorry to badger, but does anyone have any thoughts on those accessories I asked about? (Add2PSU, Lian-li, or the auxiliary PSU)?

Like I said, the PSU is only 2 months old haha. Although maybe I could cut my losses by getting like 100ish bucks and buying another one I'd prefer to just add one if it doesn't cause huge problems.

My case I'll be getting has multiple PSU mounts.
post #27 of 44

I have a question about the HX1000 that will be helpful here: were the newer HX1000s a superior design to the original? Does the newer HX1000 have the 2 x 500W design?

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post #28 of 44
I've had 3 gtx 580s before and 1000w wasn't sufficient enough just get yourself a 1200w you will be 100% fine then.
post #29 of 44
Quote:
Originally Posted by TwoCables View Post

I have a question about the HX1000 that will be helpful here: were the newer HX1000s a superior design to the original? Does the newer HX1000 have the 2 x 500W design?
yeah still the cwt puc design last I checked just a tweaked version better efficiency vs the old one but worse regulation and ripple
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post #30 of 44
I had one of the very Corsair first HX1000´s untill i FUBAR it that was back in 2008 i think?
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