Bios Power Management Profiles - Dell PowerEdge R415 Technical Manual

Dell
Feature Type
Real-Time Fixed
Clock
Power Mgmt. Fixed
Timer
Power Mgmt. Generic
Event (PME)
USB Wake Generic
DBS N/A
C State N/A
Support
Power Profile N/A
Support
Profile
Maximum Performance
OS Control
Active Power Controller
PowerEdge R415 Technical Guide
Enable/Status/ Description
Ctrl bit
location
ACPI mode, SMI handler owns power button events.
PCH The OS is able to configure the system to wake on the RTC
alarm.
PCH 24-bit power management timer is used.
PCH Each host bus's PME# signal is routed to a separate general-
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.
N/A This feature is not supported on this system since the S1 state
is not supported.
Processor MSRs This feature does P state transition under Microsoft
Windows
Processor and This feature allows multiple C state supports for processor.
PCH registers This feature will work under Windows and ACPI OS that
understand C states.
Processor/IMC 11G Servers are the most energy-smart servers that Dell
and PCH provides. In addition to P,C, and T states, BIOS exposes the
chipset power profiles to the OS. Each power profile has specific
registers settings that fine tune processor, MCH, IOH, and Southbridge.

BIOS Power Management Profiles

Table 13.
Description
DBPM Disabled (BIOS sets P-State to MAX)
Memory frequency: Maximum Performance
Fan algorithm: Maximum Performance
Enable OS DBPM Control (BIOS exposes
all possible P states to OS)
Memory frequency: Maximum Performance
Fan algorithm: Minimum Power
Enable Dell System DBPM (BIOS does not make
all P states available to OS)
Memory frequency: Maximum Performance
Fan algorithm: Minimum Power
®
.
®
35