Tested: Optix for GTX - The Good and the Bad - Technical Support - Blender Artists Community
GTX 1660 Super CUDA vs OPTIX Classroom Scene Render in Blender 2.9 - YouTube
I don't understand why this is taking so long. I have a GTX 1660 super that I am using to render this. The last frame took 53 minutes to render. : r/blenderhelp
An In-depth Look At Blender 2.80 (Beta) Viewport & Rendering Performance – Techgage
Blender 3.0 Cycles-X | GTX 1660 TI - YouTube
GPU rendering ft Turing vs Pascal vs Maxwell in Blender Cycles v2.79b & v2.80 beta + E-Cycles - YouTube