Performance and Power Consumption
required to cool a server can contribute a significant amount to the
overall system power. Thermal control is the active management of
system cooling through fan speed and system power management to make
sure that the system is reliable while minimizing system power consumption,
airflow, and system acoustic output. You can adjust the thermal control
settings and optimize against the system performance and performance-per-Watt
In the iDRAC Settings Utility, you can change the
Optimize for performance
Optimize for minimum power
Set the maximum air exhaust temperature
Increase airflow through a fan offset, if required
To do this:
In the iDRAC Settings utility, go to
iDRAC Settings Thermal page
Specify the thermal, user option, and fan settings:
Thermal Base Algorithm — By default, this
is set to
Auto, which maps to the profile settings
System BIOS >
System BIOS Settings. System Profile Settings page. You can also select a custom algorithm, which
is independent of the BIOS profile. The options available are:
Maximum Performance (Performance Optimized) — Minimizes the thermally driven performance impacts at the expense
of increased fan power. When performance is critical and system operation
may occur at high temperatures, the maximum performance setting provides
Minimum Power (Performance per Watt Optimized) — Reduces the fan speed response in high ambient environments. This
reduces the total system power that may have less performance impacts.
Minimum Power setting provides a balance of performance and power,
and is the Thermal Base Algorithm setting mapped to the Performance
per Watt system profile. It balances component cooling requirements
against performance and system power constraints.
performance impacts are not expected for setting the typical data
center ambient temperatures (18 -30°C).
Cooling Options – You can select
Max Exhaust Temperature, or
Fan Speed Offset as the cooling option.
Max Exhaust Temperature (in C) – Allows
the system fan speeds to change such that the exhaust temperature
does not exceed 50 C. It uses several discrete exhaust temperature
sensors with fan speed control and power management to make sure that
maximum exhaust temperatures are maintained at 50 C or lower at the
rear of a server.
Fan Speed Offset (Default = None) – Specify
the fan speed offset when increased thermal margin is required for
custom high-power PCIe cards or for reducing system exhaust temperatures
for adjacent equipment such as switches. A fan speed offset causes
fan speeds to increase (by the offset % value) over baseline fan speeds
calculated by the Thermal Control algorithm. By default, the value
is None. You can select:
Low Fan Speed Offset - Drives fan speeds
to a moderate fan speed (approx. 50%)
High Fan Speed Offset - Drives fan speeds
close to full speed (approx. 90-100%).
Finish, and then click
The thermal settings are configured.