Asus Z9PA-U8 User Guide - Page 35

Interrupt assignments, 2.5.4 PCI Express x16 slot (x16 link)

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2.5.3 Interrupt assignments Standard Interrupt assignments IRQ Priority Standard function 0 1 System Timer 1 2 Keyboard Controller 2 - Programmable Interrupt 3* 11 Communications Port (COM2) 4* 12 Communications Port (COM1) 5* 13 -- 6 14 Floppy Disk Controller 7* 15 -- 8 3 System CMOS/Real Time Clock 9* 4 ACPI Mode when used 10* 5 IRQ Holder for PCI Steering 11* 6 IRQ Holder for PCI Steering 12* 7 PS/2 Compatible Mouse Port 13 8 Numeric Data Processor 14* 9 Primary IDE Channel 15* 10 Secondary IDE Channel * These IRQs are usually available for ISA or PCI devices. 2.5.4 PCI Express x16 slot (x16 link) The onboard PCIE4/6 slot provides one x16 Gen3 link to CPU1 and auto switches to x8 link if PCIE3/5 is occupied. This slot supports VGA cards and various server class high performance add-on cards. 2.5.5 PCI Express x8 slot (x8 link) The onboard PCIE 3 and 5 slots provide one x8 Gen3 link to CPU1. These slots support VGA Cards and various server class high performance add-on cards. ASUS Z9PA-U8 2-15

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ASUS Z9PA-U8
2-15
* These IRQs are usually available for ISA or PCI devices.
IRQ
Priority
Standard function
0
1
System Timer
1
2
Keyboard Controller
2
-
Programmable Interrupt
3*
11
Communications Port (COM2)
4*
12
Communications Port (COM1)
5*
13
--
6
14
Floppy Disk Controller
7*
15
--
8
3
System CMOS/Real Time Clock
9*
4
ACPI Mode when used
10*
5
IRQ Holder for PCI Steering
11*
6
IRQ Holder for PCI Steering
12*
7
PS/2 Compatible Mouse Port
13
8
Numeric Data Processor
14*
9
Primary IDE Channel
15*
10
Secondary IDE Channel
2.5.3
Interrupt assignments
Standard Interrupt assignments
2.5.4
PCI Express x16 slot (x16 link)
The onboard PCIE4/6 slot provides one x16 Gen3 link to CPU1 and auto switches
to x8 link if PCIE3/5 is occupied. This slot supports VGA cards and various server
class high performance add-on cards.
2.5.5
PCI Express x8 slot (x8 link)
The onboard PCIE 3 and 5 slots provide one x8 Gen3 link to CPU1. These slots
support VGA Cards and various server class high performance add-on cards.