Microsoft’s new API DirectX 12 introduced several new features, and one of the most interesting is undoubtedly Implicit MULTIADAPTORallows it to combine graphics cards from different manufacturers and thus achieve even higher performance. Until now, the technology was demonstrated on special prepared demos, but recently also been introduced to the game Ashes of the Singularity. Are you curious to know how this solution falls in practice?

Implicit MULTIADAPTOR: Support for Multi-GPU configurations between AMD and NVIDIA

DirectX 12 rendering system introduced another split-frames in multi-GPU configurations, because instead of creating their alternate (AFR – Alternate Frame Rendering), a new interface uses a system of rendering each frame in part by each GPU (SFR – Split Frame Rendering).

It is therefore other manufacturer GPUs can also communicate with each other – even with a completely different segment of performance, because you can also combine the integrated graphics of Intel processors with Radeon Fury X (Well, the integrated graphics should also support DirectX 12).


DirectX 11 rendering


DirectX 12 rendering

The editors of the AnandTech site decided to see how the MULTIADAPTOR Implicit function works in practice just as an example of Ashes of the Singularity – a title which has already been used in the presentation capabilities of the new API. For this testing they used several GPUs with an Intel Core i7-4960X, the motherboard ASRock Fatal1ty X79 Professional, 4x 8 GB of DDR3-1866 memory and Samsung 840 EVO SSD. Everything is of course work in support of Windows 10 Pro and the latest graphics drivers from both AMD and NVIDIA side. Below you can see the results.




Implicit Function MULTIADAPTOR actually works, and not only for configuration related, but also competing models. Importantly, it feels pretty good scaling – although we cannot yet talk about the level of SLI or CrossFire, but to increase productivity and so it is quite impressive.



When combining two different Graphics cards, they will still identify as a primary and a secondary card. AnandTech tests showed that for the primary role AMD Radeon is better – especially when they are combined with older GeForces that do not support all the features of DirectX 12.

DirectX 12 again surprises us, and the Implicit MULTIADAPTOR function is considered by some to be the greatest revolution since the introduction of DirectX 9. Of course, this is a subjective opinion, but the new interface certainly cannot deny one thing – a new direction not only for the development of electronic entertainment, but also for computer components. Much of this issue depends on the developers and how willingly they will implement new programming interface in their productions.

Source: AnandTech