MSI MS-6380 - Manual (Page 71)

AWARD ® BIOS Setup
3-27
from entering power saving modes or awaken it from power saving
modes.
Note: IRQ (Interrupt Request) lines are system resources allocated
to I/O devices. When an I/O device needs to gain attention of the
operating system, it signals this by causing an IRQ to occur. After
receiving the signal, when the operating system is ready, the
system will interrupt itself and perform the service required by the
I/O device.