PCI bus 23
PCI bus
The following information is provided for a PCI bus.
PCI Bus Status
• MBytes/Sec—The average number of megabytes transferred on the selected PCI bus each second.
• PCI Utilization %—The PCI utilization for the selected PCI bus. A 32-bit PCI and 64-bit PCI can operate
simultaneously on the same PCI bus. The utilization is primarily dependent on the MBytes/Sec rate and the
negotiated PCI bus protocol:
• 32-bit PCI—Operates at 33 MHz, resulting in a maximum throughput of 132 MB/s
• 64-bit PCI—Operates at 33 MHz, resulting in a maximum throughput of 264 MB/s
• 64-bit/50-MHz PCI-X—Provides a maximum throughput of 400 MB/s
• 64-bit/66-MHz PCI or PCI-X—Provides a maximum throughput of 528 MB/s
• 64-bit/100-MHz PCI-X—Provides a maximum throughput of 800 MB/s
• 64-bit/133-MHz PCI-X—Provides a maximum throughput of 1064 MB/s
• PCI Express X1—Provides a maximum throughput of 500 MB/s
• PCI Express X2—Provides a maximum throughput of 1000 MB/s
• PCI Express X4—Provides a maximum throughput of 2 GB/s
• PCI Express X8—Provides a maximum throughput of 4 GB/s
• PCI Express X12—Provides a maximum throughput of 6 GB/s
• PCI Express X16—Provides a maximum throughput of 8 GB/s
PCI bus performance is evaluated using the Bus Utilization %.
NOTE: PMP does not accurately report the negotiated PCI bus protocol when unknown PCI devices with slower
transfer rates than the controller are configured on the same bus.
PCI Bus Inventory
• PCI Support—Displays the supported and negotiated PCI protocol (bus and speed)
• PCI Devices—Lists the PCI bus slots and any I/O expansion boards installed in the slots
