PCI (Peripheral Component Interconnect) and AGP (Accelerated Graphics Port) utilize different levels of technology to interface with computer systems. Selecting between a PCI video card and an AGP video card requires compatibility with the computer's motherboard as well as the level of speed required of the video card.
History
PCI technology was originally introduced in 1993 but did not become widely adopted until 1995 with the introduction of Windows 95 and Plug and Play technology. In 1996 the introduction of AGP provided a solution for the heavy load that was placed on the PCI bus by video cards.
Function
The primary function of the PCI bus on computer systems is to control information that is received from peripheral cards that are attached to the motherboard. PCI cards utilize shared bandwidth across the PCI bus, while AGP cards have a dedicated line for information processing.
Types
Both PCI and AGP graphics cards can be purchased in a broad range of memory capabilities. The greater the RAM (Random Access Memory) on the graphics card, the faster it is able to process information from the computer to the monitor.
Identification
The identification of PCI and AGP cards can easily be made by the number of pins used to connect to the motherboard. PCI cards use a greater number of pin connections, therefore the connector is longer than that of an AGP card. It is also possible to identify PCI and AGP slots on the motherboard to determine compatibility. PCI slots are longer than AGP slots and are white in color, whereas AGP slots are brown in color. Users may also consult the operator's manual of the computer system for questions regarding motherboard compatibility.
Misconceptions
With the introduction of PCIe technology, the common misconception is that it is compatible with old PCI standards. PCIe technology requires specific expansion slots on a computer motherboard that differ from PCI expansion slots. It is not possible for PCIe graphics cards to be used in the standard PCI slot located on computer motherboards.
Considerations
In choosing a video card, you should take into consideration your graphic processing needs. Based on PCI and AGP technology, AGP video cards have the ability to process information faster than PCI video cards. AGP video cards also provide the ability for 3D image rendering which is beneficial for computer gaming.
Theories/Speculation
With the ability of PCIe (PCI Express) technology to operate faster than both PCI and AGP, it is expected that it will become the new standard for not only video cards but all peripheral cards connected to computers.
Tags: video card, video cards, cards have, computer motherboard, computer systems, expansion slots, faster than