HP Pro 3420 PC Maintenance & Service Guide - Page 22
Computer Setup—Power, Table 3-4
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Computer Setup-Power NOTE: Support for specific Computer Setup options may vary depending on the hardware configuration. Table 3-4 Computer Setup-Power Option OS Power Management Hardware Power Management Thermal Description ● Runtime Power Management- Enable/Disable. Allows certain operating systems to reduce processor voltage and frequency when the current software load does not require the full capabilities of the processor. Default is enabled. ● Idle Power Savings-Extended/Normal. Allows certain operating systems to decrease the processors power consumption when the processor is idle. Default is extended. ● USB Wake on Device Insertion (some models)-Allows system to wake from Standby on USB device insertion. ● Unique Sleep State Blink Rates-Enable/Disable. This feature is designed to provide a visual indication of what sleep state the system is in. Each sleep state has a unique blink pattern. Default is disabled. ◦ S0 (On) = Solid green LED. ◦ S3 (Stand By)= 3 blinks at 1Hz (50% duty cycle) followed by a pause of 2 seconds (green LED) - repeated cycles of 3 blinks and a pause. ◦ S4 (Hibernation)= 4 blinks at 1Hz (50% duty cycle) followed by a pause of 2 seconds (green LED) - repeated cycles of 4 blinks and a pause. ◦ S5 (Soft Off) = LED is off. NOTE: If this feature is disabled, S4 and S5 both have the LED off. S1 (no longer supported) and S3 use 1 blink per second. ● SATA Power Management-Enables or disables the SATA bus and/or device power management. Default is enabled. ● S5 Maximum Power Savings-Turns off power to all nonessential hardware when system is off to meet EUP Lot 6 requirement of less than 1 Watt power usage. Enabling this feature will disable any wake events and management devices while in S5. Default is disabled. Displays the system fan speed (RPMs). 14 Chapter 3 Computer Setup (F10) Utility