Limitations

Hardware Limitations

General hardware limitations apply when using the GPU compositor. See also Troubleshooting Graphics Hardware.

Blender uses the same GPU resources for the UI as well as for the GPU compositor. This have a number of consequences, each of which is described in one of the following sections.

UI Freezes

Unlike rendering with Cycles, the UI might become irresponsive when using the GPU compositor for some slower GPUs.

TDR on Windows

Timeout Detection Recovery (TDR) resets the GPU driver if a GPU compositing task takes longer than the default 2 second limit. This is especially common with older GPUs when using expensive nodes like Bokeh Blur node. To prevent unexpected resets, it is recommended to increase the TDR timeout.