ASROCK Z97 OC Formula Handbuch Seite 21

2.4 Expansion Slots (PCI Express Slots)
There are 6 PCI Express slots on the motherboard.
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.
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
Single Graphics Card
Two Graphics Cards in
TM TM
CrossFireX or SLI
Three Graphics Cards in
TM
3-Way CrossFireX
Four Graphics Cards in
TM
4-Way CrossFireX
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.
PCIE1
x16
x8
Mode
x8
Mode
x8
Mode
Z97 OC Formula
PCIE2 PCIE4
N/A N/A
N/A x8
x4 x4
x4 x4
PCIE6
N/A
N/A
N/A
x4
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