PCI Express 2.0 question

[amethyst4974]

What is the difference between a PCI Express 2.0 x16 card and a PCI Express x16 video card? Is there much of a difference, and can I put a 2.0 in my x16 slot?

 

[renz496]

simply read this. it has all your answers:

http://en.wikipedia.org/wiki/PCI_Express