Will installing an M.2 SSD in the M2_2 slot affect any PCIe slots?
Yes, installing a PCIe SSD in the M2_2 slot will make the PCI_E3 slot unavailable. The M2_2 slot and PCI_E3 slot share bandwidth from the B550 chipset, so they cannot be used simultaneously. (Page 29)
From the official Msi B550-A Pro Motherboard manual, page 29
Have a follow-up question?
Answers from the official manual.
Common questions