Chenbro RM23712 User Manual

RM23712 TPS
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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 and 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.
4.2.8 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 fan speed control:

Front Panel Temperature Sensor
1

CPU Margin Sensors
2,4,5

DIMM Thermal Margin Sensors
2,4

Exit Air Temperature Sensor
1, 7, 9

PCH Temperature Sensor
3,5

Add-In Intel SAS Module Temperature Sensors
6

PSU Thermal Sensor
3, 8

CPU VRTemperature Sensors
5

DIMM VRTemperature Sensors
5

BMC Temperature Sensor
3, 6

Global Aggregate Thermal Margin Sensors
7

Hot Swap Backplane Temperature Sensors
 I/O Module Temperature Sensor (With option installed)
 Intel®SAS Module (With option installed)
Notes:
1. For fan speed control in Chenbro chassis
2. Temperature margin from throttling threshold
3. Absolute temperature
4. PECI value or margin value
5. On-die sensor
6. On-board sensor
7. Virtual sensor
8. Available only when PSU has PMBus
9. Calculated estimate
A simple modul is shown in the following figure which gives a high level representation of how the
fan speed control structure creates the resulting fan speeds

Chenbro RM23712 Specifications

General

Brand	Chenbro
Model	RM23712
Category	Racks & Stands
Language	English