How much wattage needed REALISTICLY for gtx580 ?

[sniper_sung]

First of all, a GTX580 can draw more than 300W peak. If you are fooled by nVidia's cheats then you are a fool.

Secondly, I have damaged one of my GTX580s with Corsair HX1000, because it is essentially 2 x 500W PSUs without being able to do load balancing between the two rails. (Is it a coincidence that the GTX580 connected to the same rail as my CPU died?) If you are brave enough then listen to the bullsh1t that "the number of rails doesn't matter" and try your luck there. I have seen some people saying that they had problem with GTX580 SLI + HX1000 while some people saying not.

To sum up, even a single rail 850W like AX850 can be a better choice than the dual-rail HX1000, for 580 SLI.

[Boulard83]

First of all, a GTX580 can draw more than 300W peak. If you are fooled by nVidia's cheats then you are a fool.

Secondly, I have damaged one of my GTX580s with Corsair HX1000, because it is essentially 2 x 500W PSUs without being able to do load balancing between the two rails. (Is it a coincidence that the GTX580 connected to the same rail as my CPU died?) If you are brave enough then listen to the bullsh1t that "the number of rails doesn't matter" and try your luck there. I have seen some people saying that they had problem with GTX580 SLI + HX1000 while some people saying not.

To sum up, even a single rail 850W like AX850 can be a better choice than the dual-rail HX1000, for 580 SLI.

Remember that the HX1000 is a real old PSU ... this was one of the first 1kw "highend" PSU.

Even a newer mainstream 1kw is better than the HX1000. If you go for an AX or any highend brand new models, you wont have any trouble. Ive seen some one loading 1600watts+ on the 1200watts model that i have ....

Just dont go cheap on the PSU, its one of the most important part of your computer.

[rintamarotta]

Silverstone SST-ST75F-P 750Watts and it will run OC GTX580's, how ever it would run on near full load witch isnt recommended, SST-ST85F-P would do OC'd GTX580's and OC'd i7 950 fine.

Corsair AX1200 is pretty much perfect psu, it will handle allmost anything you throw at it, and they're reliable, i have 3 of them in heavy load and they have been reliable.

[Aedubber]

Im sorry guys lol , i have the AX850 model not the HX , the new line of PSUs from corsair with the modular cables , that are actually sleeved decently . All this information has been great and helpful , as im sure this will be a good thread for other users that might search such needed info . I will def upgrade tho just to be on the safe side .

Is there an easy way to go about measuring how much wattage is being used etc while benching/gaming ? Thank you !

[dasa]

ax850 is what i would recommend to someone building a two card gtx580 sli rig with sandy and fairly close to what im looking at for an upgrade
sure your cpu uses a bit more than sandy but not enough to be a problem for such a great quality psu
if you overclock heavily it will draw more than 50% of what the psu is rated for maybe ~75% which will drops its efficiency by ~1-2% from its peak and may make the psu audible if you have a quiet pc as its fan speeds up from idle

really you have nothing to worry about but if you have given it a go and are not happy then you can always upgrade

[[XC] Synthetickiller]

I'm running a corsair HX850w w/ SLI'd GTX 570s over-volted and an i7 2600k @ 1.4v. I have no stability issues.

I will say one thing to the OP, if this isn't already stated. You have at least $1000 worth of video card. Why not just get a high end seasonic or 1000w+ PSU so you aren't running even close to 100% on load? That way, the efficience is a tad better and the unit isn't stressed.

I don't know what tri-sli 580s require (unless that's dual PSU territory), but if you'd even consider adding a third card, having a PSU that can handle it is nice.

[rintamarotta]

There is power supply calculator you could try to figure out how much wattage that system would eat, how ever i think SLI GTX580's and i7 950 Oc'd will eat about 700watts so to be really safe side, 900-1200watt psu is needed.
Tri SLI GTX580 would need 1200Watt PSU to be absolutely safe side.

[Aedubber]

Well thats why i made this thread lol , to see what you guys would or can recommend me and send me in the right direction for a PSU purchase the money is not an issue to purchase a PSU , i just want to make a purchase on something that is RELIABLE and able to handle what i throw at it. I have not seen any seasonic PSUs that are 1000 watts and up ? unless i am looking in the wrong areas?

[dasa]

I have not seen any seasonic PSUs that are 1000 watts and up ? unless i am looking in the wrong areas?

not yet but soon
Sea Sonic showcases Platinum Series, X-Series 1050 & 1250 watts
and new line of power supply series at COMPUTEX TAIPEI 2011
http://www.seasonic.com/new/twevent20110523.htm
there was talk of a july-aug release

[joger]

To sum up, even a single rail 850W like AX850 can be a better choice than the dual-rail HX1000, for 580 SLI.

Anyone doubting the HX1000's capabilities should read this review by Hardwaresecrets

As it clearly states, it is internally identical and at some points BETTER than the 1500W unit they compared it to.

I have put my 3-year-old HX1000 through some pretty intensive training: I pulled ~1150W off the wall with just two maxed GTX 480's, and reached nearly a 1300W pull with three GTX 470's while benching.

The HX1000 is easily very capable to power a couple of 580's, unless you wanna max them, and the rest of of your system, while running say LINX and FURMARK. I don't think any game ever will make that PSU top out with just two cards.

[TJ TRICHEESE]

Yea anything over 1k for what you need it for would be overkill.

Im running:
920 @ 4.3
3 480's @ 900 core
and a 470 @ ?

All on a 1250w psu.