Multi-GPU DirectX 12 shootouts show AMD with performance lead over Nvidia | Ars Technica
Microsoft details cross-IHV multi-GPU tech in DirectX 12 | KitGuru
DirectX 12 Explicit Multi-GPU Performance Review with Ashes of the Singularity | DirectX 12 Explicit Multi-GPU Performance Review with Ashes of the Singularity | GPU & Displays | OC3D Review
AMD+NVIDIA Multi-GPU DirectX12 Benchmark: R9 390X + GTX 970 in 'SLIFire' | GamersNexus - Gaming PC Builds & Hardware Benchmarks
Microsoft's DirectX 12 Enables Intel, AMD, Nvidia GPUs To Work Together
RedGamingTech
AMD's Radeon RX 6800 XT Big Navi card tested in “multi-GPU” setup, third-party gaming benchmarks shared
DirectX 12's cross-brand multi-GPU capability tested: NVIDIA and AMD cards now work together in harmony | PCGamesN