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Question on PSU/SLI'ed 580's

Last response: in Systems
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August 2, 2011 5:12:53 PM

My question is in my build will a Corsair 850 Watt be enough power for 2x580's? My current specs are

Corsair 600T case
Asus Z68 Maximus IV Extreme motherboard
Intel 2500k Oced to 4.4
8GB DDR3 2000 ram (newegg supersaver) otherwise I would have stuck with 1600
Antec H2O Kuhler
EVGA GTX 580
Samsung Spinpoint 1TB
Crucial 120GB SSD
DVDrw/CD Combo drive

I game at 1920x1080 but want to be able to max the eye candy.....max AA/AF play with tessalation/Depth of field etc. Would the 850 be enough? or get a 1000 Watt PSU? I've done my research and it varies ATON! can anyone help me out? I mean i run my wifes comp with a 570SLI set up with a 750 Watt psu. Thanks for any help

I want to be able to max SKYRIM, BF3, and The Old Republic .

More about : question psu sli 580

August 2, 2011 5:43:44 PM

It might work, but I'd probably get a little more. Check the link below.

http://www.slizone.com/object/slizone_build_psu.html

That lists the certified PSUs for various SLI configurations. Check under "For Dual GeForce GTX 480/580 GPUs". You will see that the lowest they have listed for 2x 580s are 900W PSUs. If you pick one of those you should be fine.

If you want to stick with Corsair, the TX950 is only about $20 more than the 850.
Corsair TX850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsiar TX950 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a b B Homebuilt system
August 2, 2011 5:50:48 PM

kaa0653 said:
It might work, but I'd probably get a little more. Check the link below.

http://www.slizone.com/object/slizone_build_psu.html

That lists the certified PSUs for various SLI configurations. Check under "For Dual GeForce GTX 480/580 GPUs". You will see that the lowest they have listed for 2x 580s are 900W PSUs. If you pick one of those you should be fine.

If you want to stick with Corsair, the TX950 is only about $20 more than the 850.
Corsair TX850 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsiar TX950 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...


and for $25 more than the 850W you could get this Antec 1000W:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

its modular too, to allow for better cable management/better cooling.
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August 2, 2011 6:18:19 PM

Ahhh thanks, yeah I knew it would be close. Something I have to do but it will be a pain rewiring my case :( 

Current PSU is
CORSAIR Professional Series Gold AX850

I was also thinking, should I ditch my gtx 580's and go for 2x570's? Its a debate im having with myself. I game at 1920x1080 but want max eye candy (570sli should do the job) or do I hold out and wait for the next gen video cards?
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a b B Homebuilt system
August 2, 2011 6:28:35 PM

envymert said:
Ahhh thanks, yeah I knew it would be close. Something I have to do but it will be a pain rewiring my case :( 

Current PSU is
CORSAIR Professional Series Gold AX850

I was also thinking, should I ditch my gtx 580's and go for 2x570's? Its a debate im having with myself. I game at 1920x1080 but want max eye candy or do I hold out and wait for the next gen video cards?


yeah 2 570's should be fine, just checked out a review for that PSU and it seems it can provide 971W so you should be ok.
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a c 122 B Homebuilt system
August 2, 2011 6:33:45 PM

Just because a PSU will deliver more than its rated power does not mean that you should actually operate it under those conditions.
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August 2, 2011 6:45:13 PM

Ok ...then there is these options

1. New PSU for 2x580
2. Go for a 570 Sli setup
3. Wait for next gen ....heard AMD is doing a die shrink so more GPU power less watts, maybe Nvidia will follow suit.

I realized this week with the BF3 alpha that I dont notice Jaggies during gameplay in FPS games. In slower pace RPG/MMOs I do.
Money is a non issue atm but I do reviews on websites and youtube daily and I feel like ------> :pt1cable: 
maybe other opinions can give me that needed push :D 
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Best solution

August 2, 2011 7:55:17 PM

There is little difference in the power requirements of the 570s (219 W each) and 580s (244 W each). Total you are only looking at a difference of 50 W. On top of that you are overclocking your CPU...

If money is out of the equation, I'd go with the 580s and a new PSU, maybe 1000W or so.
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August 4, 2011 6:43:54 AM

Best answer selected by EnvymeRT.
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August 4, 2011 7:00:31 AM

A few thoughts crossed my mind today, one being I used the Antec calculator for PSU and it says with my components even with my CPU oced it should only draw 798 watts with everything under full load.

Also my inspiration for the computer I build was the ODE level 3 from Digital storm, It has almost the same components and Slied 570s on a 750 watt psu.
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August 4, 2011 2:50:20 PM

Well I have looked into it a little more and I have seen people stating they are using the same PSU (AX850) with 2x GTX 580. They say it works fine but they did not list what other components they were using. Personally when I build a gaming system I spend a lot of money and I want to know that I'll be able to run what I want without issues, assuming the products aren't defective/damaged. If I can find hardware that has already been tested and certified to work in that configuration I will usually go with that.

EDIT: fixed typo
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August 4, 2011 4:52:37 PM

yeah .....not sure which PSU to go with, im thinking PC heating and cooling, antec or Corsair
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