MSI X2-109 v2 - Manual (Page 37)

2-17
Hardware Setup
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 (Peripheral Component Interconnect) Express Slot
The PCI Express slot supports the PCI Express interface expansion card.
The PCI Express x 16 slot supports up to 4.0 GB/s transfer rate.
The PCI Express x 8 slot supports up to 2.0 GB/s transfer rate.
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.
PCI Express x16 Slot
32-bit PCI Slot
PCI Express x8 Slot
DEVICE IDSEL INT A INT B INT C INT D REQ GNT
PCI AD20 PCI_PIRQ#0 PCI_PIRQ#1 PCI_PIRQ#2 PCI_PIRQ#3 PCI_REQ#0 PCI_GNT#0
PCI AD21 PCI_PIRQ#3 PCI_PIRQ#0 PCI_PIRQ#0 PCI_PIRQ#2 PCI_REQ#1 PCI_GNT#1
IT8213F AD1921 PCI_PIRQ#2 PCI_REQ#2 PCI_GNT#21
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:
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