"Yet another benefit of having lots of VRAM is being able to run multiple GPU applications at once. Apps like Maya’s OpenGL viewport, Chrome (the web browser) and Windows itself can consume considerable amounts of VRAM and leave little memory for Redshift to work with. This is, obviously, less of an issue on GPUs containing plenty of VRAM. For users that can’t afford a GPU with lots of VRAM, a possible workaround is installing an additional (cheaper) GPU which will be used for everything except Redshift. Then, the remaining GPU(s) can be disconnected from the monitor(s) and will, therefore, have the entire VRAM available for rendering with Redshift. Disconnecting a GPU from the monitor is called “headless mode”.