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would my PSU run 2 580's in sli ?

post #1 of 24
Thread Starter 
I have been told on the gpu fourms when researching an upgrade that my PSU may not be able to handle 580's in sli with the rest of my system, Iv'e come here to look for some conformation/information on the matter?
post #2 of 24
Based on the review page below, I'd say it's more than enough:

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

Their entire system was drawing 719W from the wall under full load on two GTX 580s in SLI.
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post #3 of 24
900W is enough to power two 580's in SLI. It's just that I'm not 100% on be quiet psu's as I don't think there that great in quality. But I digress, it should be fine.
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post #4 of 24
2x 580s would consume about 610W under load. A quality 850W would be enough but I am not that sure about the Be Quiet brand PSU though.
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post #5 of 24
Be Quiet! only has one 900W PSU as far as I know, the Dark Power Pro 900W.
http://www.be-quiet.net/be-quiet.net...websiteLang=en -- is this yours?
If so, it's a mediocre unit made by FSP - http://www.pc-max.de/artikel/netztei...ro-p8-900-watt
Ripple suppression is pretty mediocre, extremely close to ATX spec on the +3.3V and +5V rails at 50% load, and exceeding ATX spec at 80% load. Not impressive. +12V ripple is not great either but within acceptable limits. Voltage regulation is good, and it will deliver the power its rated for. But the high ripple is kind of a big deal. Will it power two 580s? Yes. But it may cause some of your components to malfunction sooner than they normally would have.
post #6 of 24
Thread Starter 
Quote:
Originally Posted by Shub View Post
Be Quiet! only has one 900W PSU as far as I know, the Dark Power Pro 900W.
http://www.be-quiet.net/be-quiet.net...websiteLang=en -- is this yours?
If so, it's a mediocre unit made by FSP - http://www.pc-max.de/artikel/netztei...ro-p8-900-watt
Ripple suppression is pretty mediocre, extremely close to ATX spec on the +3.3V and +5V rails at 50% load, and exceeding ATX spec at 80% load. Not impressive. +12V ripple is not great either but within acceptable limits. Voltage regulation is good, and it will deliver the power its rated for. But the high ripple is kind of a big deal. Will it power two 580s? Yes. But it may cause some of your components to malfunction sooner than they normally would have.
Yes, that is the PSU. So, with that said should I spend the extra cash to get a different PSU? If so, which brand and PSU would I be lookin for?
post #7 of 24
Quote:
Originally Posted by Jue View Post
Yes, that is the PSU. So, with that said should I spend the extra cash to get a different PSU? If so, which brand and PSU would I be lookin for?
The first PSU that comes to my mind due to its affordability is the 750W Antec TruePower New. Remember, the total power draw was 719W at the wall:

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

However, there's also something like the Corsair HX750 if you can afford the higher cost. Although, the 750W TruePower New really gives the HX750 a run for its money.
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #8 of 24
Yes it would power a SLI GTX580 rig..

A single GTX580 uses ~220W in games/3DMark 11/heaven bench etc only in Furmark it will use ~300W which is unrealistic scenario.. CLICIK HERE..

So your total system consumption would be well under 700W and your current PSU is more than capable to do the job..

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post #9 of 24
Thread Starter 
Seems like everyone has different opinions lol.
post #10 of 24
Quote:
Originally Posted by Jue View Post
Seems like everyone has different opinions lol.
He is unaware of what Shub said. I mean, in light of what Shub said, I guess it might be worth replacing it after all. So, according to Guru3D's power consumption page for two GTX 580's in SLI, even Antec's 750W TruePower New would be enough.
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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