Will a 750w PSU run 2 GTX 780's?

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alucardxva

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Dec 14, 2012
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My rig
FX 8350
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4 200 mm fans
H60 cooler
120G SSD, 250g SSD, an 1Tb hdd 7200
an a dvd drive

Just upgraded my GPU from the 7950 to the GTX 780, was wondering if i wanted to run in SLI if i should get a new PSU. Prob wont get it till later this year just would like a heads up, not to sure how much power everything takes... the GPU is like 200w or 250w..
Any info would be nice, an maybe a suggestion on which card to get next time.
Got the ASUS OC gtx 780 would i have to get the same one or can i run another 3g gtx 780.
An last, should i go for SLI or wait till the 880 Maxwell comes out
 
Solution
ubercake
Yes. If you don't overclock your CPU too much, you should be fine.

A single 780 requires 250W max:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-780/specifications

If you have two 780s and a good PSU like a Seasonic, XFX, or Corsair 750W, you'll have enough power on the 12V rail to run two standard 780s.

In your case, your card is an OC version so it will use more than the standard 250W (most likely up to 300+). As a result, I'd recommend an 850W PSU.

You can pair any GTX 780 (OC'd or otherwise) with any other GTX 780 as long as they have the same memory size; in this case 3GB on each:

http://www.geforce.com/hardware/technology/sli/faq#c17

SLI is a great option when you get to a point where you feel like you need to...
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BigBAWZ

BigBAWZ

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Dec 25, 2012
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Each GTX 780 at full load recommends roughly300w of power. I'd like to say you'd be fine as long as its a name brand PSU. As for waiting till the 880 Maxwell releases, its totally up to you. If you want the SLI then go the SLI route, if you want a single GPU the wait for the 880.
 
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ubercake

ubercake

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Oct 28, 2009
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Yes. If you don't overclock your CPU too much, you should be fine.

A single 780 requires 250W max:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-780/specifications

If you have two 780s and a good PSU like a Seasonic, XFX, or Corsair 750W, you'll have enough power on the 12V rail to run two standard 780s.

In your case, your card is an OC version so it will use more than the standard 250W (most likely up to 300+). As a result, I'd recommend an 850W PSU.

You can pair any GTX 780 (OC'd or otherwise) with any other GTX 780 as long as they have the same memory size; in this case 3GB on each:

http://www.geforce.com/hardware/technology/sli/faq#c17

SLI is a great option when you get to a point where you feel like you need to give your graphics a kick in the pants. Usually the cost of the second card will be lower by the time you decide you need a second high-end card, though availability starts to become scarce 1.5 to 2 years after a card is introduced to the market so make the SLI decision within 1.5 years of release and you're fine.

The 780 has been out almost a year so you should be either looking to get another within the next 8 or 9 months if you feel you need another for SLI.

Is your motherboard SLI-ready?
 
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Solution
Gee Bee

Gee Bee

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System in Idle = 127W
System Wattage with GPU in Full Load = 618W
Difference (GPU load) = 486W
Add in average Idle wattage - 19W
Subjective GPU power consumption = 508 Watts

750-800w is minimum for GTX 780 SLI.

Put in further perspective my 280X's are recommended to use 1000w (ie not minimum)
 
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Gee Bee

Gee Bee

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Jan 16, 2014
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Good advice about not leaving 2nd purchase too long. It happened to me once with a 5870, damn if i got get one new where i live and when one came up used, i got outbid at auction.
 
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