Users Guide

Table Of Contents
Low Fan Speed Drives fan speeds to a moderate fan speed.
Medium Fan Speed Drives fan speeds close to medium.
High Fan Speed Drives fan speeds close to full speed.
Max Fan Speed Drives fan speeds to full speed.
Off Fan speed offset is set to off. This is the default value. When set to off, the percentage does not display. The
default fan speed is applied with no offset. Conversely, the maximum setting will result in all fans running at maximum
speed.
The fan speed offset is dynamic and based on the system. The fan speed increase for each offset is displayed next to
each option.
The fan speed offset increases all fan speeds by the same percentage. Fan speeds may increase beyond the offset
speeds based on individual component cooling needs. The overall system power consumption is expected to increase.
Fan speed offset allows you to increase the system fan speed with four incremental steps. These steps are equally
divided between the typical baseline speed and the maximum speed of the server system fans. Some hardware
configurations results in higher baseline fan speeds, which results in offsets other than the maximum offset to achieve
maximum speed.
The most common usage scenario is non-standard PCIe adapter cooling. However, the feature can be used to increase
system cooling for other purposes.
NOTE: FAN configuration setting is available in iDRAC even when system does not have any FANs. This is because,
iDRAC sends the specified configuration to Chassis manager and Chassis manager can process the data from iDRAC
and send the required cooling to the system as per configuration.
Thresholds
Maximum PCIe Inlet Temperature Limit Default value is 55°C. Select the lower temperature of 45°C for third
party PCIe cards which require lower inlet temperature.
Exhaust Temperature Limits By modifying the values for the following you can set the exhaust temperature
limits:
Set Maximum Exhaust Temperature Limit
Set Air Temperature Rise Limit
Minimum Fan Speed in PWM (% of Max) Select this option to fine tune the fan speed. Using this option, you
can set a higher baseline system fan speed or increase the system fan speed if other custom fan speed options are
not resulting in the required higher fan speeds.
Default Sets minimum fan speed to default value as determined by the system cooling algorithm.
Custom Enter the percentage by which you want to change the fan speed. Range is between 9-100.
The allowable range for minimum fan speed PWM is dynamic based on the system configuration. The first value is
the idle speed and the second value is the configuration max (Depending on the system configuration, the maximum
speed may be up to 100%.).
System fans can run higher than this speed as per thermal requirements of the system but not lower than the defined
minimum speed. For example, setting Minimum Fan Speed at 35% limits the fan speed to never go lower than 35%
PWM.
NOTE: 0% PWM does not indicate fan is off. It is the lowest fan speed that the fan can achieve.
The settings are persistent, which means that once they are set and applied, they do not automatically change to the default
setting during system reboot, power cycling, iDRAC, or BIOS updates. The custom cooling options may not be supported on
all servers. If the options are not supported, they are not displayed or you cannot provide a custom value.
3. Click Apply to apply the settings.
The following message is displayed:
It is recommended to reboot the system when a thermal profile change has been made. This
is to ensure all power and thermal settings are activated.
4. Click Reboot Later or Reboot Now.
NOTE: You must reboot the system for the settings to take effect.
Setting up managed system 63