The expansion slots available on the Quad GT include three 16x PCI-E 2.0 slots. Two run at 16x (blue) while the third (black) runs at 4x. This should make the folks who run Crossfire (myself included) have the ability to find out the true capabilities of their graphics solution. Additionally, there are two standard PCI slots and one 1x PCI-E slot. Most of the peripheral connectivity is along the bottom and right hand side of the board. The exception would be the onboard 1394 connection.