Expansion Slots (Pci Express Slots) - ASROCK B550M-C R2.0 User Manual

2.4 Expansion Slots (PCI Express Slots)

There are 4 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 3.0 x16 slot) is used for PCI Express x1 lane width cards.
PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIe Slot Configurations
Ryzen series CPUs (Vermeer and Matisse):
Single Graphics Card
Two Graphics Cards in
CrossFireX TM Mode
Ryzen series APUs (Cezanne and Renoir):
Single Graphics Card
Two Graphics Cards in
TM
CrossFireX Mode
PCIE1 PCIE4
Gen4x16 N/A
Gen4x16 Gen3x4
PCIE1 PCIE4
Gen3x16 N/A
Gen3x16 Gen3x4
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