DirectX 12 Explicit Multi-GPU Performance Review with Ashes of the Singularity
Published: 24th February 2016 | Source: Oxide Games | Price: |
1080p Testing with the GTX 960 + R9 380
The GTX 960 and the R9 380 are two GPUs that are very evenly matched, offering very similar performance in the majority of gaming titles. This makes these two GPUs a great choice for DX12 Explicit Multi-Adapter, as both of these GPUs should be able to keep up with each other under load.
When testing these two GPUs together we tested them with the R9 380 installed first, with it being used to power the screen and the opposite way around, with the configuration when the R9 380 was being used first being in purple, and the config where the GTX 960 was used first in white.
What we found when testing was that both of these GPUs scaled very well, offering very high levels of scaling, especially under high batch loads. These kind of scaling levels is something that we often only find in the best of AAA games, and even then that is with matching GPUs.
We have also found that what GPU is installed first and driving the monitor matters in a Explicit Multi-GPU configuration, with the configuration where the AMD GPU was powering the screen (the purple bar) performs better than the identical setup with the GPUs installed in the reverse order, showing that AMD may have the better drivers to cope with explicit Multi-GPU.
This result may be due to the fact that this is a bridge-less Multi-GPU configuration, as AMD have designed their recent GPUs to work in Crossfire configurations without a Crossfire Bridge, which is very similar to this Explicit Multi-GPU method with DirectX 12.