Originally posted by: Stunt
16x PCI-E for gfx cards, 1x PCI-E for pci bus cards.
There's also 4x and 8x speeds, although they'll probably start with just 1x and 16x. 1x PCI-E is faster than 1xAGP, so it offers a lot more bandwidth already (plenty for, say, a Gigabit Ethernet controller, or a RAID controller).
use an agp to 16x PCI-E adapter im guessing...they already have a PCI-E to AGP adapter
Uh, no. You can't put AGP cards in a PCI-E slot with an adaptor (see existing posts on this topic). You'll have to buy a new videocard.
PCI-E replaces all agp and pci
Yes, although most motherboards will probably include legacy PCI slots for a while (I mean, it took *years* to get rid of ISA completely when PCI came out). You cannot put regular PCI cards in a PCI-E slot, although it is possible to put a PCI slot *behind* a PCI-E x1 slot (the PCI-E slots are relatively small, since it's a serial interface), like so:
..PCI-E x1 slot........PCI slot...............
|| [===] [=================]
Edge of MB
which would allow you to have both PCI and PCI-E x1 slots without taking up any "extra" space on the MB.