Computer expansion slots
- AGP - Video card
- AMR - Modem, Sound card
- CNR - Modem, Network card, Sound card
- EISA - SCSI, Network card, Video card
- ISA - Network card, Sound card, Video card
- PCI - Network card, SCSI, Sound card, Video card
- PCIe - Video card
- VESA - Video card
1.Accelerated Graphics Port, AGP
The AGP channel is 32-bits wide and runs at 66 MHz. This translates into a total bandwidth of 266 MBps, which is much greater than the PCI bandwidth of up to 133 MBps. AGP also supports two optional faster modes, with throughput of 533 MBps and 1.07 GBps. It also allows 3-D textures to be stored in main memory rather than video memory.
2.Audio/Modem Riser,AMR
Released September 8, 1998, AMR is short for Audio/Modem Riser and allows OEMs to make one card that has the functionality of either Modem or Audio or both Audio and Modem on one card.
3.Communication and Network Riser, CNR
This technology and the CNR slotwas first introduced by Intel February 7, 2000 and was mainly developed by leading hardware and software developers who helped release the AMR (Audio Modem Riser). Today, this slot is no longer found on motherboards.
4.Extended Industry Standard Architecture, EISA
The EISA bus provided 32-bit slots at an 8.33 MHz cycle rate for use with 386DX or higher processors. In addition, the EISA can accommodate a 16-bit ISA card in the first row.Although the EISA bus is backwards compatible and not a proprietary bus, it never became widely used and is no longer found in computers today.
5.Industry Standard Architecture, ISA
ISA was originally an 8-bit computer bus that was later expanded to a 16-bit bus in 1984. When this bus was originally released it was a proprietary bus, which allowed only IBM to create peripherals and the actual interface. However, in the early 1980's other manufacturers were creating the bus.
In 1993, Intel and Microsoft introduced a PnP ISA bus that allowed the computer to automatically detect and setup computer ISA peripherals, such as a modem or sound card. Using the PnP technology, an end-user would have the capability of connecting a device and not having to configure the device using jumpers or dip switches.
6.Peripheral Component Interconnect, PCI
Introduced by Intel in 1992, revised in 1993to version 2.0, and later revised in 1995 to PCI 2.1 and is as an expansion to the ISA bus. The PCI bus is a 32-bit computer bus that is also available as a 64-bit bus and was the most commonly found and used computer bus in computers during the late 1990's and early 2000's. Today's computers have replace PCI with PCI-Express.
7.3rd Generation I/O (3GIO), PCI Express, or PCIe
PCI Express is designed to replace PCI andAGP and is available in several different formats: x1, x2, x4, x8, x12, x16 and x32.
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