ASROCK B550 Taichi Manual De Instrucciones página 28

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 3.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE3 (PCIe 4.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
PCIE4 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE5 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
* If PCIE2 or PCIE4 is occupied, PCIE5 will downgrade to x2 mode.
PCIe Slot Configurations
Ryzen series CPUs (Matisse):
Single Graphics Card
Two Graphics Cards in
CrossFireX
Three Graphics Cards in
3-Way CrossFireX
26
PCIE1
Gen4x16
Gen4x8
TM Mode
Gen4x8
TM Mode
PCIE3 PCIE5
N/A N/A
Gen4x8 N/A
Gen4x8 Gen3x4