Overview
The GPU device selector is used to choose the devices used for GPU rendering and denoising. It is accessible through the standalone tool or in the host application's UI.
Standalone Tool
The tool (a shortcut) is located in the Windows Start Menu:
C:\ProgramData\Microsoft\Windows\Start Menu\Programs\V-Ray for XXXX
Host application UI
The V-Ray GPU Render Device Select menu is available for:
Settings
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Engine (available in the host platform UI)
The render engine can be CUDA or RTX.
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GPUs
Lists all available devices. If the Engine is set to CUDA, you will be able to use your CPU(s) in rendering, marked by C++/CPU.
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Rendering
Selects the GPU and/or CPU devices for rendering.
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Denoising
Selects the GPU devices for Denoising.
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Asterisk symbol (*)
The symbol next to the GPU's name indicates that the card is connected to a monitor (one asterisk for each monitor). Hovering over the GPU's name shows a tooltip with detailed information.
Setup tips
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Select a separate device for denoising
This will improve the interactive rendering performance (IPR) and GPU memory usage.
Learn more in our article about Using interactive rendering (IPR) in V-Ray GPU.
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Enable Hybrid rendering
The contribution of a CPU is similar to that of adding another (typically smaller) GPU to a multi-GPU configuration. CPUs with very high core counts (e.g., an AMD Threadripper) can often rival the speed of a GPU as shown in the graph below:
Learn more in our article about Using hybrid rendering in V-Ray GPU.
Notes
- Changing the Device Selector's settings requires a restart of V-Ray Standalone.
- CPU devices cannot be selected for denoising. V-Ray Denoiser falls back to using CPU only if there are no available GPU devices selected
- When multiple devices are selected for denoising, only the device with the highest capability is used for the denoising process