No, a PCI card shares the PCI bus with all the other PCI cards, on top of that (and because of that) it has less inherent throughput.

Though a PCI Express card has greater throughput than an AGP card and often times are slightly cheaper for the same thing, but understand that a PCI-express card DOES NOT fit in a standard PCI slot.

D-Sub is your standard VGA video connection that has been on computers for years. Often it is blue in color and always trapazoidal (is that a word?).