What is PCI Gen 2.0?

[~]

(Or PCI-E Gen 2.0?)

Does it simply mean "PCI Express, Generation 2.0"?

Or are there some immediately important programming differences between PCI 1, 2 and 3 and their diverse "form factors", or are they programmed the same at their basic level, with distinctive characteristics/registers/bitfields/commands/etc. among them, such as the "PCI Express ExpressModule" which is supposed to be hot-pluggable?

[jal]

(Or PCI-E Gen 2.0?)

Googling PCI Gen 2.0 reveales immediately a lot of detail, it seems.


JAL