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HX850W enough to handle 580 SLI 3GB Classified?

post #1 of 40
Thread Starter 
I'm thinking of buying 2x EVGA 580GTX Classified 3GB cards for BF3. I'm also getting another 6GB of Corsair ram. But I'm wondering if a Corsair HX850W is enough to handle this. I really don't want to get another PSU! Thanks.

So the specs would be like this when bought:

Asus Rampage II Extreme
i7-920 @ 4.2Ghz 1.275v D0 (with Corsair H50)
Corsair Dominator 12GB Kit 8-8-8-24 (TR3X6G1600C8D)
EVGA 580GTX Classified 3GB SLI
ASUS Xonar Essence ST
Corsair HX850W

Corsair 800D Case (3x Corsair 140mm fans)
Enermax Vegas DUO UCTVD12A (4x 120mm LED fans)
Corsair Dominator Airflow Fan

2x WD Caviar Green 2TB
1x WD Caviar Black 1TB
1x Seagate 750GB
post #2 of 40
Yep, more than enough.

You can OC your cards to 950 core and your psu will still want more!
    
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post #3 of 40
It would be cutting it too close and it may not work at all. As far as TDP goes a regular GTX580 needs about 250W under load, a classified may need more. As such the PSU may be barely enough to power the graphic cards, while you still have the CPU, RAM, HDDs, etc to think about. Imho the PSU would work with 2x 580s, but not with 3.

*EDIT: dunno why I read 3xSLI; for 2x SLI the PSU is oke.
Centurion
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post #4 of 40
Quote:
Originally Posted by dragosmp View Post
It would be cutting it too close and it may not work at all. As far as TDP goes a regular GTX580 needs about 250W under load, a classified may need more. As such the PSU may be barely enough to power the graphic cards, while you still have the CPU, RAM, HDDs, etc to think about. Imho the PSU would work with 2x 580s, but not with 3.
I think the OP is talking about two way sli.
    
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Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
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Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
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BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
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post #5 of 40
I don't think it is enough...

Judging by the roof on the cards...Especially if he OC's his CPU...He's going to be roofing it already.

I'd go for a 1000w just to make sure you have the overhead, personally...
post #6 of 40
I would get more. Stock no problem.
Ishimura
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Ishimura
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Silent Knight
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Hard DriveHard DriveHard DriveCooling
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post #7 of 40
Thread Starter 
I'm not planning on overclocking the 580 SLI cards btw!
post #8 of 40
Even if you would 850W is more than enough. A quality 750W would get you by.
(See Phaedrus's Quick and Dirty guide)
Also, make threads like these in the PSU section.
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post #9 of 40
oh..if you're not planning on OCing cards/cpu..then yes! if you are..i'd go for a little more headroom...
 
Thuban Powah!
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Thuban Powah!
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cheap! Newegg box panel ibeats with onboard. 
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post #10 of 40
Yes its enough. Even if you plan on overclocking.
It seems that everybody still is on the overestimating power draw bandwagon.

edit: check this thread: http://www.overclock.net/power-suppl...alculator.html
Edited by Cryptedvick - 10/4/11 at 6:11am
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