All the video card had to do was pass the information to the screen. Windows graphical user interfaces place a much greater strain on the CPU, as it must perform the required calculations on data and display complicated graphics on the monitor simultaneously. If performance is a must, choosing the right video adapter is as important as the processor itself. All video controllers today have an accelerator which has its own graphics processor or coprocessor. The coprocessor can handle many of the complicated tasks involved with drawing graphics to the screen, freeing CPU resources to do other things and speeding up your work environment.
More video memory allows a video card to display more colors at higher screen resolutions.
With more colors at higher resolutions, your screen will appear cleaner and brighter. Connectors Bit vs. Bus Width Modern video systems involve a great deal of information that must be moved around, particularly between the video card, the processor and the system memory. The video system interface is the method by which the video coprocessor and video memory are connected to the rest of the computer. So much so, that video performance has traditionally been the driving factor for the creation of newer and faster system buses. Local buses were created to address the bottleneck in data transfer between the processor and video card that became acute when graphical operating systems became the standard.