User`s manual

Chapter 2: Hardware setup2-20
2.7.3 Conguringanexpansioncard
After installing the expansion card, congure it by adjusting the software settings.
1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 4 for
information on BIOS setup.
2. Assign an IRQ to the card. Refer to the tables on the next page.
3. Install the software drivers for the expansion card.
• When using PCI cards on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments. Otherwise,
conicts will arise between the two PCI groups, making the system
unstable and the card inoperable. Refer to the table on the next page for
details.
• By default, if you install a discrete graphics card on the PCIe x16 slot, the
onboard GPU will be automatically disabled. Connect the VGA cable to the
discrete graphics card rst when using a discrete graphics card.
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 - Programmable Interrupt
4 12 Communications Port (COM1)
5 13 IRQ Holder for PCI Steering
6 14 Reserved
7 15 Reserved
8 3 System CMOS/Real Time Clock
9 4 IRQ Holder for PCI Steering
10 5 IRQ Holder for PCI Steering
11 6 IRQ Holder for PCI Steering
12 7 Reserved
13 8 Numeric Data Processor
14 9 Primary IDE Channel
Standard Interrupt assignments