1. The PF4 only support Express x16 (PCI-E1) and Express x1 (PCI-E2/E3) slot.
2. It didn't support Express x2 slot. These PCI Express slots only support +12V and +3V voltage. We did test the LAN card for PCI Express x1 and VGA card for PCI Express x16.
3. Please visit the following web site for Dual Channel DDR question. http://www.kingston.com/literature/MKF_495.pdf