EVGA X79 DARK - PCI-E Slot Types and Usage; PCI-E x16;x8 Slot Usage; PCI-E Lane Distribution

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PCI-E x4 Slot
There are PCI-E x4 slots that are designed to accommodate less bandwidth-
intensive cards, such as a sound or network card.
PCI-E x16/x8 Slots
These PCI-E slots are reserved for Graphics Cards and PCI-E x1, x4, x8 and
x16 devices. The design of this motherboard supports multiple Graphics Card
technologies such as SLI
®
or CrossFire.
When installing a PCI-E Graphics Card, be sure the retention clip snaps and
locks the card into place. If the card is not seated properly, it could cause a
short across the pins. Secure the card’s metal bracket to the chassis back panel
with the screw used to hold the blank cover.
PCI-E Lane Distribution
 PE1 – x16 (x8 if PE2 used)
 PE2 – x8
 PE3 – x16 (x8 if PE4 used)
 PE4 – x8
 PE5 – x4
 PE6 – x8 (x4 if PE5 used)