GPU + CPU Hybrid Rendering not using CPU

[LeePuznowski]

I'm currently testing a machine with Hybrid GPU + CPU rendering in Vray. The GPU is maxing out but the CPU is hardly active (@ 5%) I'm rendering through a network using Backburner. In the "V-Ray GPU Render Devices Select" I have Engine Type: CUDA and all devices are selected on the workstation sending out the job. On the render machine I have also activated all the devices through the "Select Rendering Devices" Tool. Why is the CPU not being fully utilized? When I use the Chaos Benchmark App, all devices including the CPU are being used. So I assume there is a user error on my part somewhere.

My Machine Specs:
AMD Ryzen Threadripper PRO 3975WX 32-Cores 3.50 GHz
128 GB
Windows 11 Pro
NVIDIA RTX A6000
Nvidia Driver 511.09
3dsmax 2022
Vray 5, update 2.2 (5.20.02 build 00001)

[Muhammed_Hamed]

Hey LeePuznowski

Do you get the same behavior when you render the scene locally on this machine ?
I will check on a similar setup to see if Hybrid rendering is working as expected with network rendering

[LeePuznowski]

Thanks for the quick reply. I'll have to test it out. Although I'm not sure if I can start 3dsmax on this machine as it's only a test machine and our other licenses are currently occupied (We're ordering a new workstation similar to this but with the 3995 WX CPU) I could possibly use Vray Standalone on the machine to test it or would that not give proper results?

[Muhammed_Hamed]

V-Ray Standalone should get the job done, if you export the scene as .vrscene format with strip path option for textures
We will test on our side as well and report back, so don't feel pressured to spend time on this

Best,
Muhammed