HP Vectra XU5 Reference Manual page 12

PCI Local Bus Architecture
This HP Vectra PC uses the PCI local bus architecture. The PCI (Peripheral Component
Interconnect) architecture lets system devices operate at speeds approaching that of the
processor and removes the data transfer bottleneck imposed by the ISA, EISA, and MCA
buses.
This performance improvement is of particular value to graphics accelerators, disk
controllers, and network adapters which need to transfer large blocks of data very quickly.
The principal features of the PCI bus are:
Processor independence
Support for up to 21 physical PCI device packages (each device package may contain
up to 8 PCI devices, which enables support for up to 168 PCI devices)
132 MByte per second peak transfer rate for both read and write transfers
PCI bus speed of up to 33 MHz.
NOTE The PCI bus specification was developed by Intel Corporation. For information
regarding the specification, contact: PCI Special Interest Group c/o Intel
Corporation, 5200 NE Elam Young Parkway, HF3-15A Hillsboro, OR 97124, U.S.A.
Vectra XU Technical Reference System Overview 12