>i'm trying to find a compilation of the differences between PCI spec >2.0 and PCI spec 2.1. I know PCI SIG has one available for 2.1 versus >2.2. Is there a similar one for 2.0 versus 2.1? Intel's application note AP-753 is a start, but it doesn't list all the differences. http://developer.intel.com/design/chipsets/applnots/273011.htm