Standby Power (+5 V) Indicator Led - Intel S875WP1LX Specification

Functional Architecture
3.6.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available* PC technology, the +5 V standby from the power supply must be
capable of providing adequate +5 V standby current. Failure to provide adequate standby
current when implementing Instantly Available PC technology can damage the power supply.
Instantly Available PC technology enables the server board S875WP1-E to enter the ACPI S3
(Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the server will appear to be off (the
power supply is off, and the front panel LED is amber if dual colored, or off if single colored.)
When signaled by a wake-up device or event, the system quickly returns to its last known wake
state. Table 7 lists the devices and events that can wake the computer from the S3 state.
The server board supports the PCI Bus Power Management Interface Specification. 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 PC technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
3.6.3

Standby Power (+5 V) Indicator LED

The standby power indicator LED (CR7J1) shows that power is still present even when the
computer appears to be off. Figure 8 shows the location of the standby power indicator LED.
CAUTION
If AC power has been switched off and the standby power indicator is still lit, disconnect the
power cord before installing or removing any devices connected to the board. Failure to do so
could damage the board and any attached devices.
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S875WP1-E TPS
Revision 4.0