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power supply, is it enough?

post #1 of 4
Thread Starter 
I am considering getting a second gtx 680 4gb ftw+ for my computer
I'm using an asus p8z77-deluxe with an i7 3770k oc'd at 4.2 everyday with a h100 cooling,16gb corsair vengeance, 256gn crucial m4 ssd, asus dvd-rw drive and a 1 tb western digital hhd. I have a corsair hx professional series 750w power supply. Can anybody tell me if I have enough power already or should I upgrade the lower supply first. Thanks
post #2 of 4
easily. I've run sli 480s on that power supply. I still have mine. 480's are maybe the hungriest single gpu cards ever and my hx750 never even blinked. I ran furmark and prime simultaneously trying to trip it and i could not. You have plenty of power. thumb.gif
post #3 of 4
Thread Starter 
Sounds good. Worse comes to worst i'll get a new psu after I get the card if it isn't enough
post #4 of 4
Quote:
Originally Posted by lightofshados View Post

I am considering getting a second gtx 680 4gb ftw+ for my computer
I'm using an asus p8z77-deluxe with an i7 3770k oc'd at 4.2 everyday with a h100 cooling,16gb corsair vengeance, 256gn crucial m4 ssd, asus dvd-rw drive and a 1 tb western digital hhd. I have a corsair hx professional series 750w power supply. Can anybody tell me if I have enough power already or should I upgrade the lower supply first. Thanks

 

You have much more than enough:

 

http://www.guru3d.com/articles_pages/geforce_gtx_680_sli_review,4.html

 

Their test system pulled 473W from the wall outlet with two GTX 680s in SLi under full load.  Their CPU was idling, so let's add 150W to say that the CPU is under full load at the same time.  This means the system would pull 623W from the wall outlet.  So, if the PSU were 85% efficient while pulling 623W from the wall, then that would mean the system is pulling about 530W from the PSU.

 

In other words, you actually have enough to put three GTX 680s in your system:

 

http://www.guru3d.com/articles_pages/geforce_gtx_680_3_way_sli_review,4.html

 

649W from the wall outlet, so about 680W being pulled from the PSU if the CPU were under full load at the same time (649 + 150 multiplied by .85).  ;)

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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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... 
  hide details  
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