ASROCK H170M-ITX/DL Manual Del Usuario página 19

2.4 Expansion Slots (PCI Express Slots)
here is 1 PCI Express slot and 1 mini-PCI Express slot on the motherboard.
Before installing an expansion card, please make sure that the power supply is switched of
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 slot:
PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
mini-PCIe slot:
MINI_PCIE1 (mini-PCIe slot) is used for WiFi module.
* his Mini-PCI Express Slot supports WiFi and mSATA devices.
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