PCI-X
Updated: 12/20/2017 by Computer Hope
Not to be confused with PCI Express, PCI-X (Peripheral Component Interconnect Extended) is a bus designed to meet the I/O demands of Fibre Channel, Gigabit Ethernet, and Ultra3 SCSI (small computer system interface). PCI-X is used in servers and was created by IBM, HP (Hewlett-Packard), and Compaq in 1998 and include the below features.
PCI-X features
- Up to 133 MHz bus speed
- 64-Bit bandwidth
- 1 GB/sec throughput
- More efficient bus operation for easier interface.
- Split transactions allows an indicator device to make only one data request and relinquish the bus, instead of constantly needing to poll the bus for a response.
- Byte count that enables indicator to specify, in advance, the specific number of bytes requested, eliminating the inefficiency of speculative prefetches.
- Backward compatibility
Note
With the introduction of PCI Express, PCI-X is not as commonly found or used today.