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Z97 OC Formula
2.4 Expansion Slots (PCI Express Slots)
There are 6 PCI Express slots on the motherboard.
PCIe slots:
PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIE3 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
PCIE5 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE6 (PCIe 2.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIe Slot Configurations
PCIE1
PCIE2
PCIE4
PCIE6
Single Graphics Card
x16
N/A
N/A
N/A
Two Graphics Cards in
CrossFireX
TM
or SLI
TM
Mode
x8
N/A
x8
N/A
Three Graphics Cards in
3-Way CrossFireX
TM
Mode
x8
x4
x4
N/A
Four Graphics Cards in
4-Way CrossFireX
TM
Mode
x8
x4
x4
x4
For a better thermal environment, please connect a chassis fan to the motherboard’s chas-
sis fan connector (CHA_FAN1, CHA_FAN2, CHA_FAN3 or CHA_FAN4) when using
multiple graphics cards.
Before installing an expansion card, please make sure that the power supply is switched off
or the power cord is unplugged. Please read the documentation of the expansion card and
make necessary hardware settings for the card before you start the installation.
