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Which power supply would I need for this system? - Page 2

post #11 of 15
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Yeah, I calculated it and I'd say a minimum of a good quality-made 900-950W PSU. Recommended: 1000W or maybe 1050W, depending on the PSU (only good quality-units are allowed, of course).

Would you really have two 7990s?

We r potentially talking but I'm SAM need to be sure what can I get to build the system. to make a CRoss of 7990 would I need that POWER?
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post #12 of 15
Quote:
Originally Posted by Overclocker.Monster View Post


We r potentially talking but I'm SAM need to be sure what can I get to build the system. to make a CRoss of 7990 would I need that POWER?

 

Yep. All you're asking me to do here is repeat myself, so yeah. ;)

 

Still, are you just tricking us into recommending a PSU that's has like 2-3x the amount of power that you will need? I mean damn, one 7990 can go for a thousand dollars!

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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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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post #13 of 15
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Yep. All you're asking me to do here is repeat myself, so yeah. wink.gif

Still, are you just tricking us into recommending a PSU that's has like 2-3x the amount of power that you will need? I mean damn, one 7990 can go for a thousand dollars!

Not tricking anybody dude, what about between 1000w bronze and 850w gold? which will be more convenient option for just 1 video card?

I'm just needing a replacement but I don't want to pick something the it wont be ok for my setup.
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post #14 of 15
Quote:
Originally Posted by Overclocker.Monster View Post

Not tricking anybody dude, what about between 1000w bronze and 850w gold? which will be more convenient option for just 1 video card?

I'm just needing a replacement but I don't want to pick something the it wont be ok for my setup.

80 plus has nothing to do with quality so dont look at 80 plus its a waste of time
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Seravee
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post #15 of 15
Quote:
Originally Posted by Overclocker.Monster View Post


Not tricking anybody dude, what about between 1000w bronze and 850w gold? which will be more convenient option for just 1 video card?

I'm just needing a replacement but I don't want to pick something the it wont be ok for my setup.

 

Let's ignore the 80+ Certification for now. The best way to approach this is to look for good, quality-made PSUs. Unfortunately, it's impossible to judge PSUs on the market, so you have to know which ones are good and which ones are bad. Here's a list, but it's incomplete:

 

http://www.overclock.net/t/183810/faq-recommended-power-supplies

 

Anyway, again, for the kind of setup you're talking about, a minimum of 900-950 is what I found in my calculation, and 1000+ is what I would recommend.

 

See here:

 

http://www.guru3d.com/articles_pages/radeon_hd_7990_review,8.html

 

With only one 7990 under full load in their system, their PSU pulled 498W from the wall outlet. Their CPU was idling, so I have to add about 150W for the 2500K under full load at 5 GHz. So together, that makes the PSU pulling 648W from the wall outlet. Their 7990 pulled 389W by itself, so adding 389W makes the PSU pulling 1037W from the wall outlet. This means that if the PSU is 90% efficient while pulling 1037W from the wall outlet, then the computer is pulling 933W from the PSU. Your gaming power draw will be lower at around 800-900W, so that's why I'm recommending 900-950W for the minimum and 1000W+ as a recommended capacity.

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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... 
  hide details  
Reply
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