PCI questions

External Since: Dec 16, 2005 Posts: 1

Is PCIe and PCI 2.2 backwards compatible?

What is the bandwidth of these two technologies?

External Since: May 30, 2005 Posts: 167

When the PCI bus first became inadequate is was mainly because of video. The AGP bus solved that problem. Later as SCSI devices became faster it became necessary to increase the speed of the PCI bus used in servers. Eventually a 64 bit bus running at 66 Mhz became common and is known as PCI-X, not to be confused with PCI express (PCI-e). Later the speed was increased to 100 Mhz. Now PCI-e is fast enough for video or a server with several high speed SCSI adapters.

Paul wrote:
>
> The original PCI parallel bus starts at 33MHz x 32 bits,
> or 133MB/sec. The clock rate and width of the bus increase
> by factors of two, as there have been improvements to the
> PCI parallel spec over the years. Server boards tend
> to use some of the faster/wider versions of the PCI
> parallel bus. Desktop boards are generally limited
> to the 133MB/sec theoretical max, with the odd exceptions.

--
Mike Walsh
West Palm Beach, Florida, U.S.A.