From Nvidia: https://blogs.nvidia.com/blog/2016/10/20/nintendo-switch/
Nintendo Switch is powered by the performance of the custom Tegra processor. The high-efficiency scalable processor includes an NVIDIA GPU based on the same architecture as the world’s top-performing GeForce gaming graphics cards.
The Nintendo Switch’s gaming experience is also supported by fully custom software, including a revamped physics engine, new libraries, advanced game tools and libraries. NVIDIA additionally created new gaming APIs to fully harness this performance. The newest API, NVN, was built specifically to bring lightweight, fast gaming to the masses.
Gameplay is further enhanced by hardware-accelerated video playback and custom software for audio effects and rendering.
We’ve optimized the full suite of hardware and software for gaming and mobile use cases. This includes custom operating system integration with the GPU to increase both performance and efficiency.
NVIDIA gaming technology is integrated into all aspects of the new Nintendo Switch home gaming system, which promises to deliver a great experience to gamers.