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Suspend to RAM (Instantly Available PC Technology)
CAUTION
For Instantly Available PC technology, the 5 V standby line for the power supply must
be capable of delivering adequate +5 V standby current. Failure to provide adequate
standby current when using this feature can damage the power supply and/or affect
ACPI S3 sleep state functionality.
CAUTION
Power supplies used with this desktop board must be able to provide enough standby
current to support the standard Instantly Available (ACPI S3 sleep state) configuration.
If the standby current necessary to support multiple wake events from the PCI and/or
USB buses exceeds power supply capacity, the desktop board may lose register
settings stored in memory.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-
RAM) sleep state. While in the S3 sleep state, the computer will appear to be off.
When signaled by a wake-up device or event, the system quickly returns to its last
known awake state.
The desktop board’s standby power indicator, shown in Figure 3, is lit when there is
standb
y power to the system. This includes the memory modules and PCI bus
connectors, even when the computer appears to be off.
If the system has a dual-colored power LED on the front panel, the sleep state is
indicated by the LED turning amber.
Figure 3. Location of Standby Power Indicator
Related Links
For more information on standby current requirements for the desktop board, go to
the link below, select the desktop board name, and then select Technical
Documentation:
http://developer.intel.com/design/motherbd/