ASROCK Z170 OC Formula Manual page 20

2.4 Expansion Slots (PCI Express Slots)
There are 6 PCI Express slots and 1 mini-PCI Express slot 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 3.0 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 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
mini-PCIe slot:
MINI_PCIE1 (mini-PCIe slot) is used for WiFi module.
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