When I watch my system resources, it doesn’t appear that my video card is being utilized at all (2-3%), and honestly my CPU is only getting tapped around 10%.
However, when I run the Render command, it fluctuates wildly from 08 - 99%! Why does it run smoothly with the Raytraced viewport but staggers inside Rhino Render?
I did make some changes in a newer version of Rhino 7 that should alleviate the problem somewhat. The version you have updates the render window for the _Render command on every pass. Newer version will do only once every second.
The problem isn’t Cycles itself, but rather the systems that sit between it and the render window that cause high CPU usage.
Having both GPU and CPU work under full load will generally throttle laptops, and this may execarbate the effect.
Could you please try this version instead to see if it helps?
I installed the newer version and that made a real difference! The rendering processes much more smoothly and consistently and my GPU seems to get used consistently (50-99%) and doesn’t drop off every second or so.