MSI mS-7592 Mode D'emploi page 21

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PCi express Slot
the PCi express slot supports the PCi express interface expansion card.
PCi Slot
the PCi slot supports Lan card, SCSi card, uSB card, and other add-on cards
that comply with PCi specifications.
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:
order
Slot
PCi  int a#
PCi express x6 slot
PCi express x slot
 2
int B#
3 4
int C# int d#
MS-7592
2