GTX 680 Power supply requirements
I am looking at upgrading my current video card to one of the GTX 680 models. My computer is a Dell XPS 730x. It has a 1000 watt power supply which shows that the 12 volt output is rated at 18 amps. Doing research online I have come across several different system requirements for the 680. Some models say a minimum of a 550 Watt power supply and make no mention of a minumum amperage for 12 output while others say a Minimum of a 550 Watt power supply wuth a minimum recommended power supply of +12 Volt current rating of 38 Amps. So, which is it? Does it differ with different models of the 680 or is there one standard that applies to all? Thanks!
I am looking at upgrading my current video card to one of the GTX 680 models. My computer is a Dell XPS 730x. It has a 1000 watt power supply which shows that the 12 volt output is rated at 18 amps.

Doing research online I have come across several different system requirements for the 680. Some models say a minimum of a 550 Watt power supply and make no mention of a minumum amperage for 12 output while others say a Minimum of a 550 Watt power supply wuth a minimum recommended power supply of +12 Volt current rating of 38 Amps. So, which is it? Does it differ with different models of the 680 or is there one standard that applies to all?

Thanks!

#1
Posted 02/12/2013 11:36 PM   
The 38A rating is for a PSU with a single 12V rail. (as in 1 12v rail for the whole system) Your PSU will have multiple rails (probably 6 of them), with certain rails dedicated to powering GPUs. The GTX680 only draws 195W itself. 195W / 12V = 16.25A required on the 12V rail(s) plugged into the card.
The 38A rating is for a PSU with a single 12V rail. (as in 1 12v rail for the whole system)

Your PSU will have multiple rails (probably 6 of them), with certain rails dedicated to powering GPUs.

The GTX680 only draws 195W itself. 195W / 12V = 16.25A required on the 12V rail(s) plugged into the card.
his psu has 5 12v rails at 18 amps each. actual max 12v power is 950 watts. op you need to list all your other specs because that Dell can run the gamut on cpus and such. you also need to list what resolution that you are going to be playing at.
his psu has 5 12v rails at 18 amps each. actual max 12v power is 950 watts.

op you need to list all your other specs because that Dell can run the gamut on cpus and such. you also need to list what resolution that you are going to be playing at.

Windows 8.1 64 bit | 4770k @4.4 | Asus Z87 Pro | Asus reference GTX 980 | G.SKILL Ares 2x8GB DDR3 2133 | Seagate SSHD 2TB | Corsair 500R | Corsair TX650 V2 | Sound Blaster Zx | Gateway 23inch 1920x1080 IPS

#3
Posted 02/13/2013 02:52 AM   
[quote="trek554"]his psu has 5 12v rails at 18 amps each. actual max 12v power is 950 watts. op you need to list all your other specs because that Dell can run the gamut on cpus and such. you also need to list what resolution that you are going to be playing at. [/quote] The processor is an Intel Core i7 940 2.93GHz with 6gig ram. The mother board does have 3 PCI express 2.0 slots. I have three 21 inch monitors that have both dvi and hdmi ports. I would assume the resolution would end up being 5760 x 1080.
trek554 said:his psu has 5 12v rails at 18 amps each. actual max 12v power is 950 watts.

op you need to list all your other specs because that Dell can run the gamut on cpus and such. you also need to list what resolution that you are going to be playing at.



The processor is an Intel Core i7 940 2.93GHz with 6gig ram. The mother board does have 3 PCI express 2.0 slots. I have three 21 inch monitors that have both dvi and hdmi ports. I would assume the resolution would end up being 5760 x 1080.

#4
Posted 02/13/2013 03:20 AM   
someone I know is running 3570K & Asus GTX680 DC2O on ***Chieftec 550W Active PFC, 80+, 14cm Fan (Retail)***
someone I know is running 3570K & Asus GTX680 DC2O on ***Chieftec 550W Active PFC, 80+, 14cm Fan (Retail)***

ºi7 4790K, ºAsus Z97-A, º4x4GB Ripjaws X, ºASUS GTX780TI DC2OC, ºCorsair GS700, ºCM 690 III, ºLG E2241T, ºWindows 7 Ultimate SP1 x64

#5
Posted 02/13/2013 07:55 AM   
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