MSI G52-M6570XA-G22 - Manual (Page 78)

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BIOS Setup
IRQ/Event Activity Detect
Press and the following sub-menu appears.
PowerOn by PCI card
This item specifies whether the system will be awakened from power
saving modes (S1, S3, S4) when activity or input signal of the specified
hardware peripheral is detected. Settings are: Enabled and Disabled.
USB Resume from S3
This item allows the activity of the USB device to wake up the system
from S3 (Suspend to RAM) state. Settings are: Enabled and Disabled.
RTC Resume
This function is for setting time for your computer to boot up. Setting
options: Disabled, Enabled.
Time (hh:mm:ss) Alarm You can choose what hour, minute and
second the system will boot up.
IRQ Activity Monitoring
Press and the following sub-menu appears.
MSI Reminds You...
If you have changed this setting, you must let the system boot up
until it enters the operating system, before this function will work.