MSI P55 GD80 User Guide - Page 45
The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards
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Page 45 highlights
MS-7581 PCI (Peripheral Component Interconnect) Slot The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that comply with PCI specifications. 32-bit PCI Slot Important When adding or removing expansion cards, make sure that you unplug the power supply first. Meanwhile, read the documentation for the expansion card to configure any necessary hardware or software settings for the expansion card, such as jumpers, switches or BIOS configuration. PCI Interrupt Request Routing The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus pins as follows: PCI Slot1 PCI Slot2 Order1 INT E# INT F# Order2 INT F# INT G# Order3 INT G# INT H# Order4 INT H# INT E# 2-29