PCI-X


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Related to PCI-X: Pci-e

PCI-X

(Peripheral Component Interconnect eXtended) A 64-bit bus technology that is backward compatible with PCI and used in servers for high-speed networking and fast hard drives. PCI cards can be plugged into a PCI-X slot, and PCI-X cards can be plugged into a 32-bit PCI slot, even allowing part of the edge connector to hang over the slot, providing nothing on the motherboard is in its way.

Introduced in 1999 and developed by IBM, HP and Compaq, PCI-X offered more speed than PCI and steadily increased to more than 30 times that of the original PCI bus. The peak bandwidth of the PCI-X bus ranged from 133 to 4262 MBytes/sec. Although a greatly enhanced Version 2.0 was introduced in 2002, it was not widely used, and PCI-X in all its versions was superseded by PCI Express (PCIe). For data rate comparisons of all PCI technologies, see PCI-SIG.

Some Name Confusion
PCI-X is also abbreviated PCX, which sounds like shorthand for "PCI Express." However, the official abbreviation of PCI Express is "PCIe." See PCI Express.


PCI-X Slots
PCI-X motherboards came with a mix of PCI and PCI-X buses. The long green slots are PCI-X, which accepted PCI-X and PCI cards. (Image courtesy of Giga-byte Technology Company Ltd., www.giga-byte.com)
References in periodicals archive ?
If a system is more than two years old, it likely has PCI or PCI-X I/O slots.
"Agilent has built on its more than 10-year history in the system I/O protocol test and validation market in offering the new PCI-X 2.0 exerciser and protocol analyzer," said Siegfried Gross, vice president and general manager for Agilent Technologies Boeblingen Verification Solutions Division.
Client system boards and workstations are migrating from PCI to x1 PCI Express connectors, while workstations which utilize PCI-X are moving to x4 PCI Express connectors.
"We are currently the first and only manufacturer in the industry to offer such a PCI-X product--the market again is wide open for us."
The host side connection was PCI or PCI-X at 133 MHz or slower.
The ISL6111 provides PCI or PCI-X slot power control for the four legacy supplies (-12 V, +12 V, +5 V and +3.3 V).
Customers purchasing this new generation of SAN components in 2005 will be in position to take advantage of the full capabilities of the upcoming wave of PCI Express-based or PCI-X 2.0 based servers; to reduce their tape backup windows; and to exploit upcoming advances in server consolidation that will cut server management costs and reduce the purchase of additional storage switches.
The server uses another PCI-X bus to host a network controller that could support an Ethernet, iSCSI, Fibre Channel (FC) or custom bus.
VMETRO has made available the Vanguard PCI-X Single Slot Carrier.
Nortel Networks 10-Gigabit Ethernet Optical Adapter for Servers will operate in a PCI-X slot and enable any PCI-X based server to cost-effectively accelerate I/O to multi-gigabit speeds.
The initial PCI standard was introduced as a 32-bit wide bus clocked at 33 MHz which has evolved to a 64-bit wide bus operating at 266 MHz clock (PCI-X 2.0).
Faster I/O performance will saturate the PCI bus, therefore, most host implementations are tied to PCI-X. Disk drive media rates continue to increase.