OptiPlex 5090 Small Form Factor Service Manual

Power

This section provides power details and settings.

Table 1. Power Power
Options	Description
USB Wake Support
Enable USB Wake Support	This section contains a toggle switch to allow the user to enable or disable USB Wake Support. It allows the system to use USB devices like a mouse and keyboard to wake the system from standby mode (OFF by default). NOTE:This feature only works if the power adapter is connected to the system.
AC Behavior	This section allows the user to control the behavior of the system when power is restored after an unexpected loss of power. The options here are: Power Off - System stays off after AC power is restored (Selected by default) Power On - System powers on after AC power is restored Last Power State - System returns to the previous state after AC power recovery
Active State Power Management (ASPM)	This section allows the user to set the ASPM level. The options here are: Auto - There is handshaking between the device and PCI Express hub (Selected by default) Disabled - ASPM power management is turned off at all times L1 Only - ASPM power management is set to level 1
Block Sleep	This section determines how aggressively the system is conserving power while in Shutdown (S5) or Hiernate (S4) mode. The options are: Disabled Enabled in S5 only Enabled in S4 and S5 (Selected by default)
Intel Speed Shift Technology
Intel Speed Shift Technology	This section contains a toggle switch to allow the user to enable or disable Intel Speed Shift Technology support. This feature enables the operating system to select appropriate processor performance automatically (ON by default).