Dell R210 II Power Management Features, Feature Type Enable/Status Description Ctrl bit Location

Dell
			Table 12.	Power Management Features
	Feature	Type	Enable/Status/		Description
			Ctrl bit
			location
	ACPI mode	Fixed	PCH		The OS uses the SCI_EN bit to switch from legacy mode to
	switch				ACPI mode.
	Sleep states	Fixed	PCH		Supported states: S0(Working), S4-OS (‗Hibernation‘ in W2K),
					and S5 (Soft-off).
					S1 (also called ‗standby‘ or ‗suspend‘) and S3 are not
					supported.
	Power Button	Fixed	PCH		In ACPI mode, OS has control of the power button. In non-
					ACPI mode, SMI handler owns power button events.
	Real-Time	Fixed	PCH		The OS is able to configure the system to wake on the RTC
	Clock				alarm.
	Power Mgmt.	Fixed	PCH		24-bit power management timer is used.
	Timer
	Power Mgmt.	Generic	PCH		Each host bus‘s PME# signal is routed to a separate general-
	Event (PME)				purpose event pin in the chipset. When a device signals PME#,
					the system wakes (if necessary), the OS detects the event,
					and a Dell-defined ASL routine handles the event. Wake-on-
					LAN is one example of a PME.
	USB wake	Generic	N/A		This feature is not supported on this system since the S1 state
					is not supported.
	DBS	N/A	Processor MSRs		This feature does P state transition under Windows
	C State	N/A	Processor and		This feature allows multiple C state supports for Processor.
	Support		PCH registers		This feature will work under Windows and ACPI OS that
					understand C states.
	Power Profile	N/A	Processor/IMC		In addition to P,C and T states, BIOS will expose the Power
	support		and PCH		Profiles to the OS. Each Power profile will have a specific
			chipset		settings and it will fine tune processor, MCH, IOH and South
			registers		Bridge.

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PowerEdge R210 II Technical Guide