ASROCK H110M-HDS Manual Del Usuario página 18

2.4 Expansion Slots (PCI Express Slots)
There are 2 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 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.
16