A graphics accelerator is a special type of video adapter that contains its own processor to boost performance levels. These processors are specialized for computing graphical transformations, so they achieve better results than the general-purpose CPU used by the computer. In addition, they free up the computer’s CPU to execute other commands while the graphics accelerator is handling graphics accelerator is handling graphics computations.
Aside from the graphics processor used, the characteristics that differentiate graphics accelerators are:
Memory Graphics accelerators have their won memory, which is reserved for storing graphical representations. The amount of memory determines how much resolution and how many colors can be displayed. Some accelerators use conventional DRAM.
However, the most common use for VGA cards is EDO DRAM with 40 or 50 nino-seconds. Others use a special type of synchronous graphics random access memory, which can operate up to 100MHz by using synchronous interface. In addition, it has 8 column Block Write function and write per bit function to improve performance in graphics systems.
A video card relies on memory to draw the screen. The amount of memory needed by a video adapter to display a particular resolution and color depth is a mathematical equation. There has to be memory location used to display every dot (or pixel) on the screen, and the number of total dots is determined by the resolution. For example 1024 x 768 resolution represents 786,432 dots on the screen.
Bus Each graphics accelerator is designed for a particular type of video bus. As of 1995, most a re designed for the PCI bus.
Register width The wider the register, the more data the processor can manipulate with each instruction. 64 bit accelerators are already becoming common, and we can expect 128 bit accelerators in the near future.
Aside from the graphics processor used, the characteristics that differentiate graphics accelerators are:
Memory Graphics accelerators have their won memory, which is reserved for storing graphical representations. The amount of memory determines how much resolution and how many colors can be displayed. Some accelerators use conventional DRAM.
However, the most common use for VGA cards is EDO DRAM with 40 or 50 nino-seconds. Others use a special type of synchronous graphics random access memory, which can operate up to 100MHz by using synchronous interface. In addition, it has 8 column Block Write function and write per bit function to improve performance in graphics systems.
A video card relies on memory to draw the screen. The amount of memory needed by a video adapter to display a particular resolution and color depth is a mathematical equation. There has to be memory location used to display every dot (or pixel) on the screen, and the number of total dots is determined by the resolution. For example 1024 x 768 resolution represents 786,432 dots on the screen.
Bus Each graphics accelerator is designed for a particular type of video bus. As of 1995, most a re designed for the PCI bus.
Register width The wider the register, the more data the processor can manipulate with each instruction. 64 bit accelerators are already becoming common, and we can expect 128 bit accelerators in the near future.
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