Intel® Server System R2000LH2/T2 Product Family TPS
Thermal Management
Revision 1.0
37
4.2.6
Thermal Sensor Input for Fan Speed Control
The BMC uses various IPMI sensors as inputs to fan speed control. Some of the sensors are
actual physical sensors and some are virtual sensors derived from calculations.
The following IPMI thermal sensors are used as input to 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
9. Available only when PSU has PMBus
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