Irq Assignments For This Motherboard - Asus Prime H270-Plus User Manual

PCI Express 3.0/2.0 x1 slots
This motherboard has four PCI Express 3.0/2.0 x1 slots that support PCI Express
x1 network cards, SCSI cards, and other cards that comply with the PCI Express
specifications.
PCI Express 3.0/2.0 x16 slots
This motherboard supports two PCI Express 3.0/2.0 x16 graphic cards that comply
with the PCI Express specifications.
VGA configuration
Single VGA/PCIe card
Dual VGA/PCIe cards
• In single VGA card mode, use the PCIe 3.0 x16_1 slot (gray) for a PCI Express x16
graphics card to get better performance.
• We recommend that you provide sufficient power when running CrossFireX™ mode.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2/3 when
using multiple graphics cards for better thermal environment.

IRQ assignments for this motherboard

HD Audio Controller
XHCI
SATA Controller
LAN Controller
PCIEx1_1
PCIEx1_2
PCIEx1_3
PCIEx1_4
PCIEx16_1
PCIEx16_2
M.2_1
M.2_2
When using PCI cards on shared slots, ensure that the drivers support "Share IRQ" or that
the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI
groups, making the system unstable and the card inoperable.
1-7
PCI Express operating mode
PCIe 3.0 x16_1 (gray)
x16 (Recommended for single
VGA card)
x16
A B
shared –
shared –
shared –
shared –
– –
shared –
– shared
– –
shared –
shared –
shared –
shared –
PCIe 3.0 x16_2
N/A
x4
C D
– –
– –
– –
– –
– shared
– –
– –
shared –
– –
– –
– –
– –
ASUS PRIME H270-PLUS