GPU usage when rendering with CPU ?

[muoto]

Hello,

noticed something strange (?). I launched a rendering using DR CPU, as usual, and i noticed that the GPU (rtx3090) was at 15-20%, even if i did nothing special, just watching the Task Manager.
When the CPU rendering was finished, the GPU came back at 1-2%

Is this normal ? What's going on when with the GPU when rendering on CPU ?

Thanks!

[Joelaff]

Could be some hardware accelerated VFB effects?

[muoto]

Lens Effects aren't enabled in the rendering

tested on another workstation, same result with 15-20% of GPU usage when rendering (1080ti)

[nikoleta.garkova]

muoto do you have Denoiser enabled? If Post Effects Rate is set to update frequently, then 15-20% of GPU usage during rendering should be normal. Are you testing with the same scene?

[muoto]

Nope, no denoiser, same scene, same two workstation just 2 different video cards (1080ti and 3090), same max, same vray

[^Lele^]

Could you share a piece of the scene which shows the behaviour with Support, then?

[muoto]

OK, i have just done it!

[^Lele^]

Thank you!