Product Description
45
1.13.2.4 Instantly Available Technology
CAUTION
For Instantly Available technology, the 5-V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing Instantly Available technology can damage the power supply. Refer to
Section 2.11.3 on page 78 for additional information.
Instantly Available technology enables the D815EEA board to enter the ACPI S3 (Suspend-to-
RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power
supply is off, the fans are off, and the front panel LED is amber if dual-color, or off if single-
color.) When signaled by a wake-up device or event, the system quickly returns to its last known
wake state. Table 10 on page 42 lists the devices and events that can wake the computer from the
S3 state.
The D815EEA board supports the PCI Bus Power Management Interface Specification. For
information on the versions of this specification, see Section 1.3. Add-in boards that also support
this specification can participate in power management and can be used to wake the computer.
The use of Instantly Available technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
The standby power indicator LED shows that power is still present at the DIMM and PCI bus
connectors, even when the computer appears to be off. Figure 8 shows the location of the standby
power indicator LED.
OM10042
CR5G1
Figure 8. Location of Standby Power Indicator LED
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