Pci_E1~5: Pcie Expansion Slots; Pci1: Pci Expansion Slot - MSI 990FXA GAMING User Manual

Expansion Slots
This motherboard contains numerous slots for expansion cards, such as discrete
graphics or audio cards.

PCI_E1~5: PCIe Expansion Slots

The PCIe slot supports the PCIe interface expansion card.
PCIe x16 Slot
PCIe x1 Slot

PCI1: PCI Expansion Slot

The PCI slot supports additional LAN, SCSI, USB, and other add-on cards that comply
with PCI specifications.
PCI Slot
Important
When adding or removing expansion cards, always turn off the power supply and
unplug the power supply power cable from the power outlet. Read the expansion
card's documentation to check for any necessary additional hardware or software
changes.