I'm looking at a new motherboard that supports "PCI 2.2." I'm not sure if I understand that standard. What I think I know is
1) It's 66 MHz, 64 bit.
2) An older, slower or 32-bit PCI card will work in a PCI 2.2 slot
3) A PCI 2.2 card will work in an older, slower or 32-bit PCI slot (but...