Datasheet

Intel® Server Board S2600CW Family TPS Intel® Server Board S2600CW Platform Management
Revision1.11
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The BIOS will have an embedded lookup table that provides thermal offset values for each
DIMM type, altitude setting, and air velocity range (three ranges of air velocity are supported).
During system boot the BIOS will provide three offset values (corresponding to the three air
velocity ranges) to the BMC for each enabled DIMM. Using this data the BMC FW constructs a
table that maps the offset value corresponding to a given air velocity range for each DIMM.
During runtime the BMC applies an averaging algorithm to determine the target offset value
corresponding to the current air velocity and then the BMC writes this new offset value into
the IMC thermal offset register for the DIMM.
5.3.14.6.5 Fan Profiles
The server system supports multiple fan control profiles to support acoustic targets and
American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE)
compliance. The BIOS Setup utility can be used to choose between meeting the target
acoustic level or enhanced system performance. This is accomplished through fan profiles.
The BMC supports eight fan profiles, numbered from 0 to 7. Fan management policy is
dictated by the Tcontrol SDRs. These SDRs provide a way to associate fan control behavior
with one or more fan profiles.
Each group of profiles allows for varying fan control policies based on the altitude. For a given
altitude, the Tcontrol SDRs associated with an acoustics-optimized profile generate less noise
than the equivalent performance-optimized profile by driving lower fan speeds, and the BIOS
reduces thermal management requirements by configuring more aggressive memory
throttling. See Table 12 for more information.
The BMC provides commands that query for fan profile support and it provides a way to
enable a fan profile. Enabling a fan profile determines which Tcontrol SDRs are used for fan
management. The BMC only supports enabling a fan profile through the command if that
profile is supported on all fan domains defined for the system. It is important to configure the
SDRs so that all desired fan profiles are supported on each fan domain. If no single profile is
supported across all domains, the BMC, by default, uses profile 0 and does not allow it to be
changed.
At system boot, the BIOS can use the Get Fan Control Configuration command to query the
BMC about which fan profiles are supported. The BIOS uses this information to display
options in the BIOS Setup utility. The BIOS indicates the fan profile to the BMC, as dictated by
the BIOS Setup Utility options for fan mode and altitude, using the Set Fan Control
Configuration command.
The BMC uses this information as an input to its fan-control algorithm as supported by the
Tcontrol OEM SDR. The BMC only allows enabling of fan profiles that the BMC indicates are
supported using the Get Fan Control Configuration command. For example, if the Get Fan
Control Configuration command indicates that only profile 1 is supported, then using the Set
Fan Control Configuration command to enable profile 2 will result in the return of an error
completion code.