DX12 & cross-vendor multi-gpu

[OSBK]

i've read in a forum that the DX12 API wich comes with windows 10 can make GPUs of diffrent vendors (Nvidia, Amd, Intel) work together. did anyone test it yet, or is there a video for it, or is it even true ?

[Tedster]

i've read in a forum that the DX12 API wich comes with windows 10 can make GPUs of diffrent vendors (Nvidia, Amd, Intel) work together. did anyone test it yet, or is there a video for it, or is it even true ?

I believe that it's a thing that will be easily possible with DX12 but it's going to be entirely up to the devs in whether they're going to make it work.

[Arcanekitten]

It requires driver support and by my guess there wont be any support from amd nor nvidia to support CF/SLI on and crossovers

 

EDIT 1

in the new DX12 game ashes of singularity supports it 

[DannyRyu]

Ashes of Singularity implemented it.

tests and benchmarks have been done

http://www.extremetech.com/gaming/216880-ashes-of-the-singularity-demonstrates-nvidia-amd-gpus-working-side-by-side

[OSBK]

I believe that it's a thing that will be easily possible with DX12 but it's going to be entirely up to the devs in whether they're going to make it work.

so it's not possible for the main time

 

It requires driver support and by my guess there wont be any support from amd nor nvidia to support CF/SLI on and crossovers

 

EDIT 1

in the new DX12 game ashes of singularity supports it 

yeah. nvidia and amd would never accept to work together

[Curufinwe_wins]

It requires driver support and by my guess there wont be any support from amd nor nvidia to support CF/SLI on and crossovers

 

EDIT 1

in the new DX12 game ashes of singularity supports it 

It by definition cannot require driver support.

 

It is done explicitly without driver knowledge, and it is unknown what steps amd or nvidia could do to stop it (likely the only course of action would be to determine when the other companies gpu is plugged in and commit hara-kiri.)

 

That said anantech recently tested it with a version of Ashes of Singularity and the results were very welcome. The talk in the tech news section was all abuzz over it monday.

 

http://www.anandtech.com/show/9740/directx-12-geforce-plus-radeon-mgpu-preview

[Curufinwe_wins]

so it's not possible for the main time

 

yeah. nvidia and amd would never accept to work together

They don't have a positive action choice in the matter, the only thing they can do it make their own card shit bricks when hooked up with another one. It isn't clear if that is a good idea though.

[Arcanekitten]

It by definition cannot require driver support.

 

It is done explicitly without driver knowledge, and it is unknown what steps amd or nvidia could do to stop it (likely the only course of action would be to determine when the other companies gpu is plugged in and commit hara-kiri. 

 

That said anantech recently tested it with a version of Ashes of Singularity and the results were very welcome. The talk in the tech news section was all abuzz over it monday.

 

http://www.anandtech.com/show/9740/directx-12-geforce-plus-radeon-mgpu-preview

i know... i edited so he knows but the driver thing i belief was said a while back so a bit outdated on my side

[OSBK]

tested in olny one game. hard to tell, looks we're waiting for more proofs

[OSBK]

They don't have a positive action choice in the matter, the only thing they can do it make their own card shit bricks when hooked up with another one. It isn't clear if that is a good idea though.

wouldn't be easy for them if they just work together as one.

[Curufinwe_wins]

wouldn't be easy for them if they just work together as one.

The easiest action is always inaction, which in this case results in cross vendor multi gpu working fine.

 

They would have to take active steps to make it not worth doing (they can't take steps to make it not work at all because it's embedded), but the only way they can do that is by making their hardware suck in tandem, which isn't a good step to take from a PR perspective.

[GoodBytes]

While it is nice and all, please don't see it as a solution that is better than SLI/Crossfire. It isn't.

The upside is that your old graphics card can help give a performance boost to some level, instead of collecting dust, if you don't mind the extra power usage and system noise.

Or for mobile system with a dedicated GPU and Intel integrated graphics, where they can work together for small performance increase.

[Curufinwe_wins]

While it is nice and all, please don't see it as a solution that is better than SLI/Crossfire. It isn't.

The upside is that your old graphics card can help give a performance boost to some level, instead of collecting dust, if you don't mind the extra power usage and system noise.

Or for mobile system with a dedicated GPU and Intel integrated graphics, where they can work together for small performance increase.

I would still be interested in seeing what midrange desktop plus a iris pro graphics could do. If standard HD graphics (from a 4770k) can add up to 4 FPS on a Titan X, then you'd expect Iris Pro to add at least 10 to a midrange, which is a huge difference in price to performance.

 

We will see if that pans out though, and it is all back to Intel selling GT3e and GT4e graphics again on desktop (talks are 2016 we might see them).