HP Workstation x4000 hp workstation x4000 - Technical Reference manual - Windo - Page 89

NOTE Power Specifications Power Saving and Ergonometry Power Saving and Ergonometry Depending on the operating system, the following power management modes are available: • Full on (S0) • Standby (S1) • Hibernate (S4) • Full off (S5) Windows NT 4.0 does not support S1 or S4. Using Power Management Power management lets you reduce the Workstation's overall power consumption by slowing down the Workstation's activity when it is idle. Operating systems differ in their power management capabilities. In Windows 2000, you can select from two power management modes: • Stand By (S1) is a low power state where the processor is shut off, but memory remains powered. Waking up the Workstation from Stand By mode is faster than from Hibernate mode because the RAM contents do not need to be restored. However, when the Workstation is in Stand By mode, it consumes more power than Hibernate mode because the memory remains powered. • Hibernate (S4) makes the machine look and behave like it is off except that it remembers the state it was in before hibernation and can be awakened without a full operating system boot. This is because the operating system copies the RAM contents out to a special location on the hard disk before entering hibernation. You must enable Hibernate mode through Power Options in the Control Panel before it can be a shut down option. Chapter 6 89