Camtasia 20.0.12 is not using GPU power for rendering – TechSmith Support
Can I use my computer while the Camtasia program is rendering (producing) videos, or will using the computer cause CPU overload, disrupting the rendering process, which may lead to lower, reduced quality
Camtasia 20.0.7 Not Using GPU For Rendering – TechSmith Support
Camtasia 2018 - GPU Rendering | Quick Tip - YouTube