S2600GZ and S2600GL

Platform Management Functional Overview Intel® Server Board S2600GZ/GL TPS
The system fans are divided into fan domains, each of which has a separate fan speed control signal and a
separate configurable fan control policy. A fan domain can have a set of temperature and fan sensors
associated with it. These are used to determine the current fan domain state.
A fan domain has three states: sleep, nominal, and boost. The sleep and boost states have fixed (but
configurable through OEM SDRs) fan speeds associated with them. The nominal state has a variable speed
determined by the fan domain policy. An OEM SDR record is used to configure the fan domain policy.
System fan speeds are controlled through pulse width modulation (PWM) signals, which are driven separately
for each domain by integrated PWM hardware. Fan speed is changed by adjusting the duty cycle, which is the
percentage of time the signal is driven high in each pulse
6.9.1
Thermal and Acoustic Management
This feature refers to enhanced fan management to keep the system optimally cooled while reducing the
amount of noise generated by the system fans. Aggressive acoustics standards might require a trade-off
between fan speed and system performance parameters that contribute to the cooling requirements, primarily
memory bandwidth. The BIOS, BMC, and SDRs work together to provide control over how this trade-off is
determined.
This capability requires the BMC to access temperature sensors on the individual memory DIMMs. Additionally,
closed-loop thermal throttling is only supported with buffered DIMMs.
In order to maintain comprehensive thermal protection, deliver the best system acoustics, and fan power
efficiency, an intelligent Fan Speed Control (FSC) and thermal management technology (mechanism) is used.
Options in <F2> BIOS Setup (BIOS > Advanced > System Acoustic and Performance Configuration) allow
for parameter adjustments based on the actual system configuration and usage. Refer to System Acoustic and
Performance Configuration for a description of each setting.
 Set Throttling Mode
 Altitude
 Set Fan Profile
 Fan PWM Offset
 Quiet Fan Idle Mode
Note: The above features may or may not be in effective depends on the actual thermal characters of a
specific system. Refer to Intel
®
Server System R1000GZ/GL product family Technical Product Specification and
Intel
®
Server System R2000GZ/GL product family Technical Product Specification for system thermal and
acoustic management.
6.9.2
Thermal Sensor Input to Fan Speed Control
The BMC uses various IPMI sensors as input to the fan speed control. Some of the sensors are IPMI models
of actual physical sensors whereas some are “virtual” sensors whose values are derived from physical sensors
using calculations and/or tabular information.
The following IPMI thermal sensors are used as input to the fan speed control:
 Front Panel Temperature Sensor
1
 Baseboard Temperature Sensor
2
 CPU Margin Sensors
3,5,6
 DIMM Thermal Margin Sensors
3,5
 Exit Air Temperature Sensor
1, 4, 8
 PCH Temperature Sensor
4,6
 On-board Ethernet Controller Temperature Sensors
4, 6
 Add-In Intel SAS/IO Module Temperature Sensors
4, 6
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