SLI Compatabiliy - Newbie Questions

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Christopher Gonzalez

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Jul 27, 2013
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Hey Guys!

I'm going to be building a PC for gaming, gameplay capturing, and HD video editing. I'll be running with an i7 4770k @stock until later, ASUS Maximus VI Hero Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131989, and 16 GB 1866 Ram (Mushkin Redline).

I'm planning on 2 Way SLI down the road, but have a few questions.

I understand the PSU impact of SLI and am coming prepared with 950-1000 watts.

So:

Can 2 cards of the same series with inequal VRAM SLI?

Can 2 cards with different clock frequencies SLI?

Can 2 cards of different manufacturers SLI?

What is the CPU impact of SLI?

And a question just about graphics cards:

Is 2 Gb of VRAM enough for the next decade of gaming? I've been looking at GTX 760 FTW and GTX 770 SC (both ACX)

Thanks a lot!
 
Solution
Gam3r01
With the VRAM if they are at different numbers they should be limited to the lower card, so a 2 and a 4 gig would run like 2 gigs. Clock speeds are set to the lower speeds on either card, so an 800 and say a 1GHz both at running at 800MHz. 2 different makes can run in sli just fine. The cpu will have to work harder to supply both cards, so it can get to bottlenecking. 2 gigs in sli is good as long as you use one monitor, for eyefinity it can get demanding, but single monitor gaming will be sufficient.
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Gam3r01

Gam3r01

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Jan 12, 2013
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With the VRAM if they are at different numbers they should be limited to the lower card, so a 2 and a 4 gig would run like 2 gigs. Clock speeds are set to the lower speeds on either card, so an 800 and say a 1GHz both at running at 800MHz. 2 different makes can run in sli just fine. The cpu will have to work harder to supply both cards, so it can get to bottlenecking. 2 gigs in sli is good as long as you use one monitor, for eyefinity it can get demanding, but single monitor gaming will be sufficient.
 
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Solution
renz496

renz496

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Jun 16, 2009
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Have you read cf/sli faq at sticky section? It has the answer for most of your question. About cpu you need fast one for multi gpu setup. 2gb good enough for now but for future games you might need more. But that's assuming you run on maximum setting with insane level of AA. 4GB is quite useless for a single 760 but 2 760 might be able to take advantrage of more than 2 gb of vram in the future. A test made by hard ocp shows that only 3 way sli able to take advantage the available vram of the 4gb model. With only two the gpu running put raw grunt before they can fully utilize that 4gb. I assume this will be the same case with 760 4gb.
 
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