V-Ray GPU can run on one or more CUDA/RTX-capable graphics cards. To specify which cards are to be used, go to Windows Start Menu > Menu > Programs > V-Ray 6 for 3ds Max #### > Select rendering devices for V-Ray GPU for 3ds Max #### for each render server machine and pick. By default, the render server machine uses all its graphic cards in CUDA DR rendering, if nothing has been specified beforehand.
The tool can also select GPU devices for denoising. It also allows for setting Low GPU Thread Priority per device.
Note that when multiple devices are selected for denoising, out of all the devices that match the query only the device with the highest compute capability is used for the denoising process.
The Select devices for V-Ray rendering tool has less functionalities and a different design in earlier versions of V-Ray. It is located again in Windows Start Menu > Programs > V-Ray for 3ds Max > Select rendering devices for V-Ray GPU for 3ds Max ####.
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Click here to see how the tool looks in earlier V-Ray versions.
