ASROCK X570 Extreme4 Handbuch Seite 30

2.4 Expansion Slots (PCI Express Slots)
There are 5 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 4.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 4.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE3 (PCIe 4.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 4.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIE5 (PCIe 4.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIe Slot Configurations
Ryzen Series CPUs (Matisse)
Ryzen Series CPUs (Pinnacle Ridge)
Ryzen Series CPUs (Picasso)
For a better thermal environment, please connect a chassis fan to the motherboard's
chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP , CHA_FAN3/WP or
CHA_FAN4/WP ) when using multiple graphics cards.
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PCIE1 PCIE4
Gen4x16 Gen4x4
Gen3x16 Gen3x4
Gen3x8 Gen3x4