Dell System 310 Specifications Page 47

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Dell
Dell PowerEdge R310 Technical Guide 46
Table 13. Power Management Features on the R310
Feature Type Enable/Status/
Ctrl bit
location
Description
ACPI mode
switch
Fixed PCH The OS uses the SCI_EN bit to switch from legacy mode to
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
Clock
Fixed PCH The OS is able to configure the system to wake on the RTC
alarm.
Power Mgmt.
Timer
Fixed PCH 24-bit power management timer is used.
Power Mgmt.
Event (PME)
Generic 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.
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
Support
N/A Processor and
PCH registers
This feature allows multiple C state supports for Processor.
This feature will work under Windows and ACPI OS that
understand C states.
Power Profile
support
N/A Processor/IMC
and PCH
chipset
registers.
11G Servers will be the most energy smart servers that Dell
will ship. In addition to P,C and T states, BIOS will expose the
Power Profiles to the OS. Each Power profile will have a
specific settings and it will fine tune processor, MCH, IOH and
South Bridge. For detailed explanation on how this feature
works, please look at BIOS Power Management specification
located in Design Docs under R310 engineering.
Here are the current Power profiles that 11G BIOS will expose in BIOS setup.
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