GPU
The GPU preference determines whether or not GPU acceleration is enabled.
% Total Physical GPU Memory
At a value of 0, GPU images are not cached. This means the GPU images will flow through from the first GPU image to the last without going through RAM, but it means every GPU node in the chain will render in sequence any time something changes. Increasing the value allows GPU images to be stored in the cache like RAM images, making editing faster.
Cache GPU Images
Controls whether GPU results go in the cache.
Mode
Auto
Automatically chooses either GPU or CPU acceleration based on your graphics card.
GPU
Forces GPU acceleration on. If your graphics card is not capable of GPU acceleration, this setting will have no effect.
CPU
Forces CPU acceleration on.
Note: The GPU preference doesn’t actually change until there is a frame or processing update.
Pipeline GPU Images
Controls whether GPU results are passed on to the next node or downloaded to RAM.