WYP
News Guru
EVGA States that the GTX 1080 will not support any higher than 2 way SLI configurations.
Read more on the GTX 1080 not supporting higher than 2-way SLI.
Read more on the GTX 1080 not supporting higher than 2-way SLI.
The GTX 1080 will not support any higher than 2 way SLI configurations
- Thread starter WYP
- Start date
Dicehunter
Resident Newb
Weird decision on their part, You'd think they would want to support this so they could sell more cards to the enthusiasts 
WYP
News Guru
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.
Dicehunter
Resident Newb
NeverBackDown
AMD Enthusiast
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 Bridge
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 Bridge
Dicehunter
Resident Newb
I think that's the most likely reason TBH.
Have you seen multi GPU users of more than 2 cards complaining ? It sounds like kids throwing their toys out of the pram ^_^
NeverBackDown
AMD Enthusiast
Could be both. I'd really like to know if this HB bridge is even any good. Certainly not as good as XDMA from AMD. So much unused bandwidth there
WYP
News Guru
TBH the new SLI bridge promises double the bandwidth, and looking at the bridge it just looks like it uses the two normal SLI fingers for single card SLI.
jimma47
New member
Diminishing returns on the investment probably - Plenty of hours go in to making the drivers work for (just a guess) probably .01% of the particular cards buyers.
Of course this doesn't bode well for anyone with unusual or different setups. Still it's not surprising considering they can't get multiple monitors to work in surround if there are any differences in sync polarity and resolution.
They may also be looking at other ways of running them as well. I recall there was talk of not needing a bridge for upcoming releases? I think it might have been for AMD.
Of course this doesn't bode well for anyone with unusual or different setups. Still it's not surprising considering they can't get multiple monitors to work in surround if there are any differences in sync polarity and resolution.
They may also be looking at other ways of running them as well. I recall there was talk of not needing a bridge for upcoming releases? I think it might have been for AMD.
Dicehunter
Resident Newb
jimma47
New member
AMD got rid of bridges when the 290X came out
Yup that was it. Cheers.
WYP
News Guru
One thing we need to consider is what is the future of SLI.
With Nvidia announcing a new SLI bridge they certainly have a plan moving forward with SLI, we just don't know it yet. Anyone that knows is NDA'd up the wazoo.
Consider what the future of SLI will be in a future with DX12 and Vulkan Explicit Multiadapter. The way multi-GPU will work in the future is going to be different than today.
With Nvidia announcing a new SLI bridge they certainly have a plan moving forward with SLI, we just don't know it yet. Anyone that knows is NDA'd up the wazoo.
Consider what the future of SLI will be in a future with DX12 and Vulkan Explicit Multiadapter. The way multi-GPU will work in the future is going to be different than today.
NeverBackDown
AMD Enthusiast
Which would mean 18GB/s, because double's from the previous 9GB/s. AMD can use upto 32GB/s on the PCI bus, obviously after the GPU takes some it's probably somewhere around 25GB/s. And it will always rise because PCI will continue to get faster, Nvidia should just have followed suit. Seems like a better option.
If anything it'll just get it closer to 100% scaling, instead of the average 80-90% we see with the extra bandwidth. Which is where the performance gains come from that the EVGA guy was mentioning.
Seems like DirectX 12 and Vulcan multi-gpu support makes SLI a moot point. Anything moving forward, could possibly be supported in DX12/Vulcan for setups with 3 or more GPUs. I'd imagine there'd be less cost and a cleaner PCB if they did away with it altogether, how much and whether that would be passed on to the consumer is another story...
Kilbane
Hagrid Look-A-Like
I would be more interested to know more about the use of the HB SLI bridges. It would make sense if the new SLI bridges allow more data transfer and possible memory sharing across the two cards. New API's have been said that it will allow memory independantly giving access to a shared memory pool rather than restricting multi card setups to the memory total of one card.
Speculation is all anything can be right now until further information is given.
Speculation is all anything can be right now until further information is given.
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