Expansion Slots (Pci Express Slots) - ASROCK B450M/ac R2.0 User Manual

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 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 2.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIe Slot Configurations
Ryzen Series CPUs (Matisse Ridge)
Ryzen Series CPUs (Pinnacle Ridge)
Ryzen Series CPUs (Summit Ridge)
Ryzen Series CPUs (Picasso Ridge)
Ryzen Series CPUs (Raven Ridge)
Athlon Series CPUs
28
PCIE1 PCIE2
x16 x4
x16 x4
x16 x4
x8 x4
x8 x4
x4 x4