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post #11 of 16
Quote:
Originally Posted by specialk2hz View Post
Thanks everyone for the suggestions. I'm going to go ahead and keep my 850 and see how it goes. Would using a kill a watt be a good way to see how much power I'm pulling? I went ahead and ran the calculator and it's saying about 790w. Do you think that is too close considering it doesn't account for CPU overclocking?

Thanks!
Well, Guru3D.com was able to get their test system to pull 719W from the wall outlet when it had two GTX 580s in SLI under full load (source). If their PSU was 85% efficient during this measurement, then that means the system pulled about 612W from the PSU. If it were 87% efficient, then that would be about 625W.

They also recommend adding about 100-150W to account for the rest of the system which ends up being anywhere from 712W/762W for 85% efficiency with their PSU to about 725W/775W for 87% efficiency with their PSU.

The AX850 is capable of continuously delivering 850W, so you're all set.
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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 #12 of 16
850w is perfectly fine for two GTX 580's. Keep your AX850.

Quote:
Originally Posted by Captain1337 View Post
No, don't even bother with those, if you are going to pay a good $250 for a power supply, at least buy the best of the best(the king of 1200 watt power supplies). The Antec High Current Pro HCP-1200 smokes those two power supplies that you have listed, that's why its called the king of 1200 watt power supplies. Get a 1200 watt psu, so later on, you can add another if you get a pretty reasonable price.
The AX1200 and HCP-1200 are fairly close. The HCP-1200 just slightly edges it out. It doesn't "smoke" it. The Seasonic unit also hasn't been reviewed, and we don't know how it performs yet.

Quit talking out of your behind.
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post #13 of 16
Quote:
Originally Posted by GameBoy View Post
The AX1200 and HCP-1200 are fairly close. The HCP-1200 just slightly edges it out. It doesn't "smoke" it. The Seasonic unit also hasn't been reviewed, and we don't know how it performs yet.
Very true,

Its also a pretty good indication the seasonic unit will be very good, they have possibly the best reputation for both performance and reliability (not price ) and are also the OEM for many other psu companies, notably corsair.
    
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post #14 of 16
Quote:
Originally Posted by GameBoy View Post
850w is perfectly fine for two GTX 580's. Keep your AX850.



The AX1200 and HCP-1200 are fairly close. The HCP-1200 just slightly edges it out. It doesn't "smoke" it. The Seasonic unit also hasn't been reviewed, and we don't know how it performs yet.

Quit talking out of your behind.
Well now I'm curious: are the AX1200 and HCP-1200 units similar in capacity? I mean, I'm talking about how the HCP-1200 seems to be more like a 1500W or 1800W or something...
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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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Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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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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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 
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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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post #15 of 16
Quote:
Originally Posted by TwoCables View Post
Well now I'm curious: are the AX1200 and HCP-1200 units similar in capacity? I mean, I'm talking about how the HCP-1200 seems to be more like a 1500W or 1800W or something...
Both the AX1200 and HCP-1200 can pump out a lot more than their rated wattage (I think the OC3D review had the AX1200 at 1500w.) But it still wouldn't be advised to load them past 1200w continuously. The life span would suffer, as would the electrical performance, and efficiency. It would turn a "great" 1200w into an "OK" or "decent" 1500w.

Besides, a 1200w label picks up more sales compared to a 1500w+ label.
Edited by GameBoy - 10/16/11 at 12:16am
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post #16 of 16
Quote:
Originally Posted by specialk2hz View Post
Thanks everyone for the suggestions. I'm going to go ahead and keep my 850 and see how it goes. Would using a kill a watt be a good way to see how much power I'm pulling? I went ahead and ran the calculator and it's saying about 790w. Do you think that is too close considering it doesn't account for CPU overclocking?

Thanks!
My opinion is that the calculator over estimates for you
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GreenPimpStar
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