Dell OptiPlex GXi Reference And Installation Manual

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2-8 Dell OptiPlex GXiLow-Profile Systems Reference and Installation GuideSaving Monitor PowerIf you have a Video Electronics Standards Association(VESA ® ) Display Power Management Signaling(DPMS)-compliant monitor, enabling the POWER MAN-AGEMENT category reduces monitor power consumptionduring periods of keyboard and mouse inactivity.NOTE: The power management feature monitors activity ofa mouse connected to the Personal System/2 (PS/2)-compatible mouse port.By setting POWER MANAGEMENT to MAXIMUM, REGU-LAR, or MINIMUM, you can set predefined time-out periods(see Table 2-2) for the two successive monitor shutdownstages, standby and off.NOTE: Each monitor manufacturer defines the details ofthe shutdown stages for its own monitors. But in allcases, power consumption decreases with each stagefrom “on” (full power) to “standby” (reduced power; thedisplay image usually disappears) to “off” (where powerconsumption is minimal). To define these stages for yourmonitor, see the documentation that came with themonitor.From either shutdown stage, you can return full power tothe monitor in one of the following ways:• For most DPMS-compliant monitors, any subse-quent activity—including moving the mouse—should return full power to the monitor.• A few DPMS-compliant monitors require that youturn monitor power off and then on again to return tofull power.Check your monitor documentation for information onhow your monitor is designed to operate.Saving EIDE Hard-Disk Drive PowerFor most systems, enabling POWER MANAGEMENT at anylevel causes EIDE hard-disk drives to switch to low-power mode after about 20 minutes of system inactivity(see Table 2-2).NOTES: All EIDE drives shipped with your systemsupport this feature. (For more information on EnergyStar systems, see “Energy Star Compliance” inChapter 1.)However, not all EIDE hard-disk drives support this fea-ture. Enabling this feature for drives that do not supportit may cause the EIDE drive to become inoperable untilthe computer is restarted and the POWER MANAGEMENTcategory is disabled.In low-power mode, the disks inside the drive stop spin-ning. They remain idle until the next drive access, whichcauses them to start spinning again. (Because the diskstake a few seconds to regain full speed, you may notice aslight delay when you next access the hard-disk drive.)When POWER MANAGEMENT is set to DISABLED (thedefault), the disks spin constantly as long as the sys-tem is turned on.SoundSOUND determines whether the integrated audio control-ler is ON or OFF. You must reboot your system before achange takes effect.NICNIC determines whether the network interface controller(NIC) is ON or OFF. You must reboot your system beforea change takes effect.CAUTION: Check your monitor documentation tomake sure you have a DPMS-compliant monitorbefore you enable this feature. Otherwise, you riskdamaging the monitor.Table 2-2. Power Time-Out PeriodsPowerManage-mentSettingEIDE DriveSpindownTime-OutsMonitorStandbyTime-OutsMonitorOffTime-OutsDisabled Never Never NeverMaximum 20 minutes 10 minutes 1 hourRegular 20 minutes 20 minutes 1 hourMinimum 20 minutes 1 hour Never