Intel® Ethernet Adapters and Devices User Guide
Power Options
The Power Management tab in the device’s Device Manager property sheet or the Adapter Settings panel in Intel® PROSet Adapter Configuration Utility (Intel® PROSet ACU) includes several settings that control the device’s power consumption. For example, you can set the adapter to reduce its power consumption if the cable is disconnected.
See the following for more information on power options:
ACPI Power States
Advanced Configuration and Power Interface (ACPI) supports a variety of power states. Each state represents a different level of power, from fully powered up to completely powered down, with partial levels of power in each intermediate state.
The ACPI power states are:
- S0:
On and fully operational
- S1:
System is in low-power mode (sleep mode). The CPU clock is stopped, but RAM is powered on and being refreshed.
- S2:
Similar to S1, but power is removed from the CPU.
- S3:
Suspend to RAM (standby mode). Most components are shut down. RAM remains operational.
- S4:
Suspend to disk (hibernate mode). The memory contents are swapped to the disk drive and then reloaded into RAM when the system is awakened.
- S5:
Power off
Microsoft Windows Server* is ACPI-capable. It does not support waking from a power-off (S5) state, only from standby (S3) or hibernate (S4). When shutting down the system, these states shut down ACPI devices, including Intel Ethernet adapters. This disarms the adapter’s remote wake-up capability. However, in some ACPI-capable computers, the BIOS may have a setting that allows you to override the operating system and wake from an S5 state anyway. If there is no support for wake from S5 state in your BIOS settings, you are limited to Wake From Standby when using these operating systems in ACPI computers.