MSI 970A User Guide - Page 29

Chapter 1 MS-7693 Expansion Slot This mainboard contains numerous ports for expansion cards, such as discrete graphics or audio cards. PCIe Slot The PCIe slot supports the PCIe interface expansion card. PCIe 2.0 x16 Slot PCIe 2.0 x1 Slot PCI Slot The PCI slot supports additional LAN, SCSI, USB, and other add-on cards that comply with PCI specifications. 32-bit 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. PCI Interrupt Request Routing IRQ, or interrupt request lines, are hardware lines over which devices can send interrupt requests to the processor. The PCI IRQ pins are typically connected to the PCI bus pins as followed: Order1 Order2 Order3 Order4 PCI1 INT E# INT F# INT G# INT H# PCI2 INT F# INT G# INT H# INT E# 1-17