In an effort to compare and contrast features of predecessor buses, the next section of this chapter describes some of the key features of IO bus architectures defined by the PCI Special Interest Group (PCISIG). These buses, shown in Table 1-1 on page 12, include the PCI 33 MHz bus, PCI- 66 MHz bus, PCI-X 66 MHz/133 MHz buses, PCI-X 266/533 MHz buses and finally PCI Express.
|Bus Type||Specification Release||Date of Release|
|PCI 33 MHz||2.0||1993|
|PCI 66 MHz||2.1||1995|
|PCI-X 66 MHz and 133 MHz||1.0||1999|
|PCI-X 266 MHz and 533 MHz||2.0||Q1, 2002|
|PCI Express||1.0||Q2, 2002|
In comparing these buses, it is not the authors' intention to suggest that any one bus is better than any other ...