Intel Desktop Board D975XBX2 Technical Product Specification 
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1.13.1.2  Wake-up Devices and Events 
Table 9 lists the devices or specific events that can wake the computer from specific 
states. 
Table 9.  Wake-up Devices and Events 
These devices/events can wake up the computer…  …from this state 
LAN   S1, S3, S4, S5 
(Note)
 
Modem (back panel Serial Port A)  S1, S3 
PME# signal  S1, S3, S4, S5 
(Note)
 
Power switch  S1, S3, S4, S5 
PS/2 devices  S1, S3 
RTC alarm  S1, S3, S4, S5 
USB S1, S3 
WAKE#  S1, S3, S4, S5 
Note:  For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program.  Setting this option 
to Power On will enable a wake-up event from LAN in the S5 state. 
 
NOTE 
The use of these wake-up events from an ACPI state requires an operating system that 
provides full ACPI support.  In addition, software, drivers, and peripherals must fully 
support ACPI wake events. 
1.13.2  Hardware Support 
 CAUTION 
Ensure that the power supply provides adequate +5 V standby current if LAN wake 
capabilities and Instantly Available PC technology features are used.  Failure to do so 
can damage the power supply.  The total amount of standby current required depends 
on the wake devices supported and manufacturing options. 
The board provides several power management hardware features, including: 
•  Power connector 
•  Fan headers 
•  LAN wake capabilities 
•  Instantly Available PC technology 
•  Resume on Ring 
•  Wake from USB 
•  Wake from PS/2 keyboard 
•  PME# signal wake-up support 
•  WAKE# signal wake-up support 
LAN wake capabilities and Instantly Available PC technology require power from the 
+5 V standby line.