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GTX 780 SLI Power requirements?

post #1 of 19
Thread Starter 
So, I'm currently running Core i7 3820 @ 4,3GHz and an HD 7970 which I'll be selling off in the near future as soon as I can get my hands on the new 780s. I'll be going with two of them in SLI, water cooled once the blocks are out and hence overclocking them to their limits. The CPU I could take further but I don't really mind it where it is at the moment.

Just been wanting to get a new power supply for some time now and thought about going for the Corsair AX860i. What do you say guys? Will 860W be viable? I know that the official power specs aren't out yet, but I think we can pretty safely guess that they will be somewhere pretty close to that of a Titan.

I'd love to hear from someone who has 2x Titans and an LGA 2011 socket CPU, but all advice is ofc welcome. You may also recommend other power supplies if you like, but they ought to be quiet under load, fully modular and no longer than 180mm.
post #2 of 19
New one's usually are better at power consumption so I would say anything around 850w should be a good minimum mark.
You can go with some seasonic 850w or if the price difference isn't much just go with a 1000w so you don't have power problems even in future.
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post #3 of 19
Quote:
Originally Posted by KenLautner View Post

New one's usually are better at power consumption so I would say anything around 850w should be a good minimum mark.
You can go with some seasonic 850w or if the price difference isn't much just go with a 1000w so you don't have power problems even in future.

Watch this

I cant see why you sould need more then 750 watts
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post #4 of 19
Thread Starter 
Neither can I. On the other hand I have killed a Corsair TX850 with dual 7970s OC'd to 1050GHz and my current CPU, which was running at 4,5 GHz. It was 3 years old but still - a very highly regarded power supply that should've been more than enough.
post #5 of 19
Quote:
Originally Posted by hizodge View Post

Neither can I. On the other hand I have killed a Corsair TX850 with dual 7970s OC'd to 1050GHz and my current CPU, which was running at 4,5 GHz. It was 3 years old but still - a very highly regarded power supply that should've been more than enough.

Which one is it?

There are 3 versions of it now one by CWT one by Seasonic cant recall which is the older one but it might be the CWT

The newest one is made by Chicony Power Technology
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post #6 of 19
Any good 850w should be enough really, even with big overclock on both CPU and GPU's. But if you want to future proof you could go for a good 1000-1200w PSU.
Personally I am going to get two 780's and a Corsair AX1200i smile.gif
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post #7 of 19
Quote:
Originally Posted by go4life View Post

Any good 850w should be enough really, even with big overclock on both CPU and GPU's. But if you want to future proof you could go for a good 1000-1200w PSU.
Personally I am going to get two 780's and a Corsair AX1200i smile.gif

Not really the best choice you made then if you are looking at the AX1200I
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post #8 of 19
Quote:
Originally Posted by shilka View Post

Not really the best choice you made then if you are looking at the AX1200I

What the hell are you talking about? http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=300
Don't get much better than this! What would you recommend then?

Quote from review:
Quote:
Performance (40% of the final score) - Boy, where do I start here? Do we talk about the excellent voltage regulation? Maybe we can talk about the excellent ripple/noise suppression instead. With an average (all 3 main rails) of less than 1% when it comes to voltage regulation, this has to be the BEST performing unit to date here at JonnyGURU.com. With the maximum ripple of 13mV during our progressive tests, we have nothing to complain about there either. Although the AX1200i did have a tough time hitting 80+ Platinum for us, when we factor in our 1% error tolerance, we are still in good shape. All I can say is.... 10, 10, 10... 10 I say!
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post #9 of 19
Quote:
Originally Posted by go4life View Post

What the hell are you talking about? http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=300
Don't get much better than this! What would you recommend then?

Quote from review:

You dont need that much power its a waste of money and it would cost you more then to run a 1200 watts PSU with the same system then with a 850 watts PSU

Also the AX1200i is overpriced and is more of a gimmick with the Corsair link software it does still not work 100% right

Also read these threads you find all info in there as well as reviews just open the spoilers

http://www.overclock.net/t/1390866/super-flower-leadex-information-thread
http://www.overclock.net/t/1391520/fractal-design-power-supplies-information-thread
http://www.overclock.net/t/1392001/nzxt-power-supplies-information-thread

Super Flower Leadex is one to look out for
Edited by shilka - 5/17/13 at 6:29am
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post #10 of 19
we don't know the amount of tdp for the 780's. the gtx 680 could easily run sli with a 650/660w psu because it didn't need that much power. also, there are rumors that the 780 will have 2 different variations where as one will have 384bit, but lower vram, and the other will have 256bit interface, but higher vram. since the 780s use gk110 architecture, it may require more juice like the titan. just wait until we know the facts, then go from there.
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