Multi GPU

DirectXTK

DirectX 12 requires the application explicitly support multi-GPU scenarios through multiple devices.

To support multi-GPUs, you need to create more than one Direct3D 12 device and create a GraphicsMemory instance for each one.

When creating resources or DirectX Tool Kit rendering objects, you need to create one for each device and submit the draw for each. When creating GeometricPrimitive shapes or using Model loader functions, there is a defaulted ID3D12Device* parameter that is used to control which instance of GraphicsMemory is used.

Further reading

Multi-Engine and Multi-Adapter Synchronization

Explicit DirectX 12 MultiGPU, the Affinity Layer helper library, and your game

Multi-Adapter Support in DirectX* 12 (Intel)

GDC 2016: Explicit Multi GPU Programming with DirectX 12 (PDF, nVidia)