Table of Content

1. Industry Standard Architecture (ISA)
2. Extended Industry Standard Architecture (EISA)
3. Micro Channel Architecture (MCA)
4. VESA Local Bus (VESA)
5. Peripheral Component Interconnect (PCI)
6. PCI-X
7. Accelerated Graphics Port (AGP)
8. PCI Express (PCI-E, PCIe)
9. Intelligent Input/Output (I2O)
10. InfiniBand Architecture (IBA)

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Industry Standard Architecture (ISA)

Extended Industry Standard Architecture (EISA)

• Introducted in 1987 to compete against MCA bus
• 32-bit bus
• Dual purpose bus
• Replace by better performing PCI bus

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Micro Channel Architecture (MCA)

• Developed by IBM in 1987
• Not widely adopted by vendors as IBM charged royalties for the rights to use it
• 116-pin connector
• Made extinct by the license-free EISA bus and later by the PCI bus

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VESA Local Bus (VESA)

• Developed in 1992 as an extension of video memory
• 116-pin connector
• Replaced by better performing AGP bus

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Peripheral Component Interconnect (PCI)

PCI-X

• 64-bit wide bus

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Accelerated Graphics Port (AGP)

• Introduced by Intel in 1997
• Used mostly with AGP-compatible video cards
• Original AGP standard (AGP 1x) offered data transfer rate of 264MB/sec
• 32-bit wide bus
• 132-pin connector
• AGP 2x, 4x, and 8x offered data transfer rate of 528MB/sec, 1GB/sec,and 2GB/sec respectively
• Replaced by PCI Express in late 2000s

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PCI Express (PCI-E, PCIe)

• Developed by Intel in 2004
• Formerly known as 3GIO
• 1-bit wide bus (serial communication)
• Bandwidths:
  • PCI-E 1x: 250 MB/sec
  • PCI-E 2x: 500 MB/sec
  • PCI-E 4x: 1000 MB/sec
  • PCI-E 8x: 2000 MB/sec
  • PCI-E 16x: 4000 MB/sec
  • PCI-E 32x: 8000 MB/sec

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Intelligent Input/Output (I2O)

• Designed in 1996 by Intel and I20
• Works along with a PCI bus
• Uses special input and output drivers to "think for itself" thus freeing up computer resources
• End of life in October 2000

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InfiniBand Architecture (IBA)

• Conceived in 1999
• High-speed / high-output bus to replace PCI
• Low latency

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