ASRock Z87 Extreme3 - Manual (Page 24)

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2.4 Expansion Slots (PCI and PCI Express Slots)
There are 3 PCI slots and 3 PCI Express slots on the motherboard.
PCI slot:
The PCI1, PCI2, and PCI3 slots are used to install expansion cards that have 32-bit
PCI interface.
PCIe slots:
PCIE1 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
PCIe Slot Configurations
PCIE2 PCIE3
Single Graphics Card x16 N/A
Two Graphics Cards in
CrossFireX TM or SLI TM Mode
x8 x8
For a better thermal environment, please connect a chassis fan to the motherboard’s chas-
sis fan connector (CHA_FAN1, CHA_FAN2 or CHA_FAN3) 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.