You see GPU in Task Manager not running at full performance when rendering on 3D software (Lumion /Blender /C4D /Clo /V-ray / Redshift ..etc…). Eg: CPU usage is 100% and GPU usage is 10%.

Normally, the GPU in Task Manager only displays representations of 3D tasks, Video Decode, or main tasks. When using 3D Render Engines that use the GPU for rendering, the essence is to use the GPU’s CUDA core to render.

To check CUDA is rendering by going to Task Manager, in GPU, click on 3D/Video Decode (or whatever), and switch to Cuda.

In case GPU performance is still low, please contact us immediately via live chat or your iRender supporter.