In the Blender 2.90 alpha Optix rendering is now enabled for GTX-series cards. The other area where GTX can now use Optix is with Cycles rendering. The Open Image Denoiser (Intel denoiser) is also coming for Blender 2.90 (viewport and render process) and will work with any video card and CPU. Note that Optix AI-Accelerated denoising uses only works with Nvidia video cards. GTX and RTX owners alike will love this feature. This makes working with ray traced scenes much more accessible. With very few samples, you can get a clean (though with painting-like artifacts) ray traced image, even on an older video card. Optix AI-Accelerated viewport denoising is the most apparent. In Blender this affects two things for GTX owners: viewport denoising and Cycles rendering. Now, Blender 2.90 now includes Optix support for Nvidia GTX video cards (actually any Maxwell or newer card). Optix has shown impressive acceleration in Cycles rendering (30-45% faster than CUDA in my testing), and in denoising, but these features were only available for Nvidia’s RTX cards with their ray tracing RT cores. Optix for Nvidia GTX Video Cards is Here: The Good and the Bad
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