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DirectX 12 Multi-GPU support is being released as a preview through the dx12_mgpu_preview branch on steam.
We feel that it is in a state where we can release it to you, but we are aware that some systems might still experience issues.
Please let us know when you are experiencing issues.
To activate Multi-GPU DirectX 12 you are required to do the following:
Within your Steam Library, right-click on Deus Ex: Mankind Divided.
Select ‘properties’ from the context menu and navigate to the Beta tab.
From the dropdown menu, select dx12_mgpu_preview then close the window.
Known Multi-GPU DirectX 12 issue:
Some systems may experience some graphical corruption.
The update will be applied by Steam automatically when you next start the game.
Just got that DX12 patch for mGPU, pretty amazing boost in performance in seems.
5960x @ 4.6 Ghz
GTX 1080(s) @ 2002 mhz core / 2700 mhz memory
3440 x 1440
DX11 - Single GPU
Average - 40.9 fps
Minimum - 33.7 fps
Maximum - 49.0 fps
DX11 - Dual GPU
Average - 56.2 fps
Minimum - 47.8 fps
Maximum - 70.4 fps
DX12 - Dual GPU
Average - 73.3 fps
Minimum - 52.6 fps
Maximum - 91.8 fps
Scoreboard updated.
Could you confirm which drivers you were using please.
Common then Kaap get all those Multi Gpu's tested to see if this is any good .