This usually means there is not enough memory to store the scene for use by the GPU. The graphics drivers provided by the computer manufacturer can sometimes be outdated or incomplete. In case of problems, be sure to install the official graphics drivers from the GPU manufacturers website, For the most up to date information on the performance of different devices,īrowse the Blender Open Data resource. Different technologies also have different compute timesĭepending on the scene tested. This varies depending on the hardware used. This is can be enabled with Distributed Memory Across Devices in the preferences. The exception is NVIDIA GPUs connected with NVLink, where multiple GPUs can share memory at a small performance cost. Typically, no, each GPU can only access its own memory. Would multiple GPUs increase available memory? Yes, go to Preferences ‣ System ‣ Compute Device Panel, and configure it as you desire. Can multiple GPUs be used for rendering? This has a performance impact, but will usually still result in a faster render With CUDA, OptiX, HIP and Metal devices, if the GPU memory is full Blender will automatically This is usually much smaller than the amount of system memory the CPU can access. (see Would multiple GPUs increase available memory? for more information). Typically, the GPU can only use the amount of memory that is on the GPU Why does a scene that renders on the CPU not render on the GPU? īut the most common one is that there is not enough memory on your graphics card. The only complete solution for this is to use a dedicated GPU for rendering, and another for display. Heavy scenes can also make Blender unresponsive on newer GPUs, when using a lot of memory or executing expensive shaders, however this is generally less of a problem. This can make Blender unresponsive while it is rendering. On older GPU generations, graphics cards can only either render or draw the user interface. Open Shading Language is only supported for OptiX, with some limitations listed in the documentation.įrequently Asked Questions Why is Blender unresponsive during rendering? Path Guiding is not supported on any GPU. Both discrete GPUs and APUs are supported. HIP is supported on Windows and Linux and requires aĪMD graphics card with the Vega architecture or newer. OptiX takes advantage of hardware ray-tracing acceleration in RTX graphics cards, for improved performance. OptiX is supported on Windows and Linux and requires a Nvidia graphics cards with compute capability 5.0 and higherĪnd a driver version of at least 470. With the compute capabilities and supported graphics cards. Nvidia graphics cards with compute capability 3.0 and higher. Rendering Technologies īlender supports different technologies to render on the GPU depending on the particular GPU manufacturerĬUDA is supported on Windows and Linux and requires a Use GPU rendering in Properties ‣ Render ‣ Device. To enable GPU rendering, go into the Preferences ‣ System ‣ Cycles Render Devices,Īnd select either CUDA, OptiX, HIP, oneAPI, or Metal. On the other hand, they also have some limitations in rendering complex scenes, due to more limited memory,Īnd issues with interactivity when using the same graphics card for display and rendering. This can speed up renderingīecause modern GPUs are designed to do quite a lot of number crunching. Graphics card for rendering, instead of the CPU. GPU rendering makes it possible to use your The NVIDIA OpenGL driver lost connection with the display driver.
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