Specifications

Computer Architecture and Maintenance (G-Scheme-2014)
 32-bit or 64-bit bus width
 32-bit address space (4 gigabytes)
 32-bit I/0 port space (now
deprecated)
 256-byte configuration space
 5-volt signaling
 Reflected-wave switching
Q.state basic difference between PCI , PCI-X and PCI-E Bus
Ans. PCI-X uses a parallel interconnect along a bus that is shared with other PCI-X
devices, just like PCI. In fact, PCI-X is best thought of as "PCI-eX tended", as it is simply
an extension of the legacy PCI 32-bit format, with which it is backward-compatible. It
differs mainly in the fact that the bus is now 64-bits wide, and runs at higher
frequencies (now up to 533MHz, compared to 66MHz - the fastest PCI frequency).
PCI-Express, on the other hand, uses a serial interconnect along a switched bus
dedicated exclusively to that slot. In this respect, and most others, it uses radically new
architecture, having little to do with old PCI. Furthermore, PCI-Express has the unique
capability of multiplying up individual data "lanes", to produce aggregate
interconnects that can deliver up to 16 times the bandwidth of a single lane. This is why
you will always see PCI-Express slots referred to as "PCI-Express*4" or "PCI-
Express*16" etc.
Q.State Application of PCI bus
Ans. Applications
PCI-X has been with us in the server and workstation arena for some time now,
as a bus for high-bandwidth server peripherals such as RAID Controllers and
Gigabit Ethernet.
Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)
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