RGUs may have their origin with experiments with graphics controllers on mainframe computers in the 1970s.

Nevertheless, ATI did develop 8514-compatible graphics controllers: the Mach8 and Mach32.

Special multimedia features include a built-in graphics controller which is integrated onto the CPU local bus and an audio subsystem.

GPU switching is used on laptops with multiple graphics controllers.

In this configuration it is sometimes referred to as a video controller or graphics controller.

Competitors integrated less elegant algorithms inside their mainstream graphics controllers - a trend Tseng followed with its latter generation of chips.

Allows high speed applications to perform multi-buffering with less screen flickering and without having to wait for the graphics controller.

This allows applications and operating system utilities to change the refresh rate in a standard way on all VBE 3.0 graphics controllers.

If the framebuffer of the graphics controller is not updated, the picture of the computer screen will appear to hang until the buffer receives new data.

At the time, displays were tightly coupled to controller attributes and had no way to dynamically configure the graphics controller to its required parameters.