ASROCK QC5000M-ITX/PH Mode D'emploi page 14

2.2 Expansion Slot (PCI Express Slots)
here is one 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 slots:
PCIE1 (PCIe 2.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
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