Rumor: Unknown API Will Allow Nvidia+AMD Multi-GPU

[SteelCrysis]

http://www.techspot.com/article/1137-dir...page8.html

The idea of having a GTX 980 and a R9 390X seems amazing, as you can take full advantage of any and all games. If a game favors Nvidia use the 980 as the primary card or vice-versa. In the case of Ashes of the Singularity the game so heavily favors AMD that having a GeForce graphics card working for you is almost a disadvantage.

Yes, the 390X/980 combo was 48% faster than a single 390X, but two 390Xs were 68% faster. Still, the ability to mix and match graphics cards opens up a world of possibility.

Realizing we've only tested a small number of the possible GPU combinations and the games that will follow in the coming year, there's more to be seen but for now Ashes has given us a nice peak of what's to come. You can expect more weird and wonderful GPU combinations when this and other DX12 games roll out in 2016.

http://www.guru3d.com/articles_pages/ash...ew,12.html

For those of you that wonder, the left side colors flashing are FCAT color tags, each rendered frame gets one color assigned in a strict sequence. Obviously you can see screen-tearing with VSYNC off in this video, hence it looks worse then it is with VSYNC/FreeSync/Gsync enabled.

That's it for this article, I decided to cut off the game test until the SYNC issue is solved on AMDs side. The good news is this. Last week I presented this behaviour to AMD. AMD has successfully identified the issue. Radeon Software 16.1 / 16.2 does not the DX12 DirectFlip feature, which is mandatory and the solve to the specific VSYNC situation we ran in to. For Nvidia it seems that ASYNC compute shaders are not working and we have to winder as to why anno February 2016 still is the case ?

AMD intends to resolve this issue in a future driver update, after which we'll update this article. The same goes for Nvidia with ASYNC compute support, or better yet the lack of it.