A much needed upgrade to the PCI bus was announced today and "is backwards compatible with previous PCI standards". 
Here is some numbers to chew on.
"The new spec uses double-data-rate and quad-data-rate techniques to dramatically increase the PCI bus bandwidth to 2.1 Gigabytes/second or 4.3 Gbytes/sec."
Related Web URL: http://www.eetimes.com/sys/news/OEG20020205S0021
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