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The GTX 1080 may not support any higher than 2 way SLI configurations

The GTX 1080 will not support any higher than 2 way SLI configurations

EVGA States that the GTX 1080 will not support any higher than 2 way SLI configurations

The GTX 1080 will not support any higher than 2 way SLI configurations

 

When Nvidia announced their new HB (High-bandwidth) SLI bridge, we noted that Nvidia did not showcase a 3-way or four-way SLI variant of this new SLI bridge design.

Now EVGA has confirmed that the GTX 1080 will not support any higher than 2-way SLI configurations, making users unable to pair any more than two of these new GPUs together in a single gaming system, at least when using traditional "bridged" SLI. 

Below is a quote from EVGATech_ChrisB, a member of EVGA Tech support and a moderator of the EVGA Forums.   

 

       We can confirm that 1080 cards only support up to 2-way SLI and anything above this will not work, no matter the SLI bridge.  

Please however keep in mind that if you do use the new SLI bridge along with two 1080 cards, then it gives more performance than 2-way SLI did in the past on previous series.

 

- Update

EVGA has since deleted the above statement, with Jacob Freeman (EVGA Product Manager) later stating that "More info about SLI support will be coming soon, please stay tuned."

 

 

 

  EVGA States that the GTX 1080 will not support any higher than 2 way SLI configurations

 

While users of more than two GPUs in either SLI or Crossfire are rare, there is still a market for those who want to pair more than two matching GPUs in a single system, which will leave some Nvidia fans disappointed by this change.

It seems that Nvidia may be dropping support for anything greater than two-way SLI simply because it may not be worth their investment in creating SLI profiles and drivers for such an uncommon system configuration. Right now Nvidia is yet to comment on the GTX 1080's lack of 3-way or 4-way SLI support.  

Nvidia has not released much new information on their new SLI bridge and the future of SLI, but I'm sure we will be hearing more about it over the next few days and weeks. 

 

DirectX 12 and Explicit Multi-Adapter

With DirectX 12 in Ashes of the Singularity we have already seen that Multi-GPU without an SLI bridge is possible,  as in this game we were able to combine the powers of our GTX 980Ti and our R9 Fury X together to achieve framerates that were similar to a matched SLI or crossfire setup. 

With Explicit Multi-Adapter it is possible to combine several GPUs without an SLI bridge and still achieve good scaling, so perhaps moving forward Nvidia may move to a bridgeless multi-GPU method as modern APIs become more commonly used. 

With Explicit DirectX 12 and Vulkan multi-GPU scaling will be something that is almost exclusively handled by developers, requiring no specific SLI or Crossfire profile from AMD or Nvidia in order to function. With these new APIs the way multi-GPU works has fundamentally changed, and that will require a new approach from both AMD and Nvidia to support it moving forward.  

At this time we can only guess at what the future holds for multi-GPU systems, but if more developers follow the example of Oxide games it certainly will be a positive one.  

 

You can join the discussion on Nvidia's GTX 1080 not supporting more than 2-way SLI on the OC3D Forums

 

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Most Recent Comments

11-05-2016, 16:41:49

steverebo
Hmm mm interesting move by nvidia, I guess 2 way Sli is the most commonQuote

11-05-2016, 16:49:51

Dicehunter
Weird decision on their part, You'd think they would want to support this so they could sell more cards to the enthusiasts Quote

11-05-2016, 16:53:49

WYP
Quote:
Originally Posted by Dicehunter View Post
Weird decision on their part, You'd think they would want to support this so they could sell more cards to the enthusiasts
Yeah, but even on these forums who uses more than two GPUs?

It is a rare use case, but it does make me sad that Nvidia is not supporting it.Quote

11-05-2016, 16:55:51

Dicehunter
Quote:
Originally Posted by WYP View Post
Yeah, but even on these forums who uses more than two GPUs?

It is a rare use case, but it does make me sad that Nvidia is not supporting it.
True, Even browsing enthusiast forums I rarely see people running more than 2 x GPU's.

8Pack will be annoyed though, He won't get to make his insane rigs for OCUK anymore.Quote

11-05-2016, 16:57:37

NeverBackDown
I'd say it may be a limit of there HB SLI bridge, might only be good for a certain length before speeds drops off, kinda how ethernet cables work too.

I have a strong feeling it's something along the lines i just said, or they rather not focus driver time on it. It's just strange seeing as there GP100 gpus and NVlink use upto 4 GPUs, which led me to believe it's the HB BridgeQuote
Reply
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