Dell R515 manual Bios Power Management Profiles, Dbs

Dell

Feature	Type	Enable/Status/	Description
		Ctrl bit
		location
Power	Fixed	PCH	In ACPI mode, OS has control of the power button. In non-
Button			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 Microsoft®
			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	N/A	Processor/IMC	11G Servers are the most energy-smart servers that Dell
Profile		and PCH	provides. In addition to P,C, and T states, BIOS exposes the
Support		chipset	power profiles to the OS. Each power profile has specific
		registers	settings that fine tune processor, MCH, IOH, and Southbridge.

Table 13. BIOS Power Management Profiles

Profile	Description
Maximum Performance	DBPM Disabled (BIOS sets P-State to MAX)
	Memory frequency: Maximum Performance
	Fan algorithm: Maximum Performance
OS Control	Enable OS DBPM Control (BIOS exposes
	all possible P states to OS)
	Memory frequency: Maximum Performance
	Fan algorithm: Minimum Power
Active Power Controller	Enable Dell System DBPM (BIOS does not make
	all P states available to OS)
	Memory frequency: Maximum Performance
	Fan algorithm: Minimum Power

35

PowerEdge R515 Technical Guide