MSI B150A GAMING PRO - Realtek HD Audio Manager; Audio Manager Settings

13
Overview of Components
PCI_E1~4, PCI1~3: PCIe and PCI Expansion Slots
PCI_E1
PCI_E3
PCI_E2
PCI_E4
PCI1
PCI2
PCI3
x16 x16
x4
Multiple graphics cards installation recommendation
Important
󰁡 
the PCI_E2 slot is recommended.
󰁡 
is installed a device.
󰁡 
unplug the power supply power cable from the power outlet. Read the expansion

changes.