The RAMDAC, or Random Access Memory Digital-Analog Converter, is responsible for converting digital signals to analog signals which will be used by a computer display that uses analog inputs such as Cathode Ray Tube (CRT) displays. RAMDAC functions like a RAM chip that regulates the performance of the graphics card.

Graphics cards and the display modules must be connected by some means. The most common connection systems between the two are: the analog-based Video Graphics Array (VGA); digital-based Digital Visual Interface (DVI) such as vidia geforce gtx 580 flat-panel LCD and video projectors; Video In Video Out (VIVO) for connecting televisions, DVD players, video recorders and video game consoles; and High-Definition

Nowadays, high performing graphics card tend to consume a large amount of electrical energy. As the processing power of the graphics card increases, so does its demand for electrical power. Despite efforts to make recent CPU and power supply more efficient, the power demands of GPUs still continues to rise, thus making the graphics card the biggest electricity consumer in a computer.