Intel® Server Board S2600CW Platform Management
Intel® Server Board S2600CW Family TPS
70
Revision 2.4
The processor provides PECI-accessible counters, one for the total processor time elapsed
and one for the total thermally constrained time, which are used to calculate the percentage
assertion over the given time window.
5.3.10.5
Processor Voltage Regulator (VRD) Over-Temperature Sensor
The BMC monitors processor VRD_HOT# signals. The processor VRD_HOT# signals are routed
to the respective processor PROCHOT# input in order to initiate throttling to reduce processor
power draw, therefore indirectly lowering the VRD temperature.
There is one processor VRD_HOT# signal per CPU slot. The BMC instantiates one discrete IPMI
sensor for each VRD_HOT# signal. This sensor monitors a digital signal that indicates whether
a processor VRD is running in an over-temperature condition. When the BMC detects that this
signal is asserted, it will cause a sensor assertion which will result in an event being written
into the sensor event log (SEL).
5.3.10.6
Inlet Temperature Sensor
Each platform supports a thermal sensor for monitoring the inlet temperature. For Intel server
chassis, the inlet temperature sensor is on front panel with address 21h. For 3rd chassis,
sensor 20h which is on the front edge of baseboard can be used as inlet temperature sensor
with several degrees offset from actual inlet temperature.
5.3.10.7
Baseboard Ambient Temperature Sensor(s)
The server baseboard provides one or more physical thermal sensors to monitor the ambient
temperature of a board location. This is typically to provide rudimentary thermal monitoring
of components that lack internal thermal sensors.
5.3.10.8
Server South Bridge (SSB) Thermal Monitoring
The BMC monitors the SSB (Wellsburg) temperature. This is instantiated as an analog
(threshold) IPMI thermal sensor.
5.3.10.9
Exit Air Temperature Monitoring
The sensor is only valid for Intel server chassis. BMC synthesizes a virtual sensor to
approximate system exit air temperature for use in fan control. This is calculated based on the
total power being consumed by the system and the total volumetric airflow provided by the
system fans. Each system shall be characterized in tabular format to understand total
volumetric flow versus fan speed. The BMC calculates an average exit air temperature based
on the total system power, front panel temperature, the volumetric system airflow (cubic feet
per meter or CFM), and altitude range.
The Exit Air temp sensor is only available when PMBus* power supplies are installed.
5.3.10.10
Ethernet Controller Thermal Monitoring
The Intel® Ethernet Controller I350-AM4 and Intel® Ethernet Controller 10 Gigabit X540
support an on-die thermal sensor. For baseboard Ethernet controllers that use these devices,
