Technical Product Specification

Intel® Server Boards S4600LH2/T2 TPS
Revision 2.0
69
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 R2000LH2/T2 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
 PSU Thermal Sensor
4, 9
 CPU VR Temperature Sensors
4, 7
 DIMM VR Temperature Sensors
4, 7
 Integrated BMC Temperature Sensor
4, 7
 Global Aggregate Thermal Margin Sensors
8
Notes:
1. For fan speed control in Intel chassis
2. For fan speed control in 3rd party chassis
3. Temperature margin from throttling threshold
4. Absolute temperature
5. PECI value or margin value
6. On-die sensor
7. On-board sensor
8. Virtual sensor