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Intel Desktop Board D845EPI Product Guide
20
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.
Related Links:
For more information about standby current requirements for the desktop board, navigate to the
Technical Product Specification by selecting the desktop board from the link below and then
selecting Product Documents:
http://support.intel.com/support/motherboards/desktop
Wake from USB
USB bus activity wakes the computer from an ACPI S1 or S3 state.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB..
Wake from PS/2 Keyboard/Mouse
PS/2 keyboard/mouse activity wakes the computer from an ACPI S1 or S3 state.
PME# Wakeup Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, or
S5 state.
Speaker
A speaker is mounted on the desktop board. The speaker provides audible error code (beep code)
information during the Power-On Self-Test (POST).
Battery
A battery on the desktop board keeps the values in CMOS RAM and the clock current when the
computer is turned off. See Chapter 2 starting on page 21 for instructions on how to replace the
battery.
Real-Time Clock
The desktop board has a time-of-day clock and 100-year calendar. The battery on the desktop
board keeps the clock current when the computer is turned off.