This is more of a “Vray” question, but I’m running my renders on my GTX 3090 (24gb RAM) and notice that during the render the GPU never gets past 10% utilization.
I have my settings in Vray set to using the RTX engine for rendering. Is there some other setting that helps me maximize my GPU on renders? I’m new to this so just trying to understand if I’m one setting away from a different outcome.
@MikeWayzovski Wouldn’t Vray want to hit my GPU as hard as it can for the render? It feels like if I’m at 10% GPU max there’s something (setting?) that’s not properly utilizing it. Or, it may be used in some way that isn’t reflected in the 10% report.
You’ve selected the RTX render engine which uses the RT cores, rather than just the other parts of the GPU that CUDA uses for example- so it may be as simple as windows just can’t report on that part of the GPU.
Well, it is a 3090 with 24 gb memory. It’s just cruising. I have the same card and can’t believe the speed I see with Lumion. Software needs to keep up.
I’m not sure to be honest, I think CUDA and RTX use entirely different APIs to communicate with the hardware and I don’t know which ones V-Ray uses for both of those.
I imagine that the CUDA option doesn’t touch the RT cores, as that uses the Tensor cores normally. Perhaps a question for V-Ray.
CPU, CUDA and RTX rendering modes in V-Ray are not quite 100% feature equivalent, but the only way to see performance differences would be to render the same scene in each and take the time.
I have a feeling that whatever is registering in Windows 10 as the GPU being busy isn’t the same as what’s being access in the GPU. I’ve never seen my GPU utilization in Win 10 go beyond 5-10% - ever.
Windows might be measuring quite different things than the use of the CUDA cores to do mathematical calculations. While you are waiting for the render to complete, the part that draws your screen is probably sitting almost idle.
Yeah, u may be right. I can see an increase of the gpu usage only when the rendering buquet switches to a new one. Also the CUDA graphic is at 100% while the 3D graphic remains ibetwen 4-12%.