Users Guide

Modifying thermal settings using iDRAC web interface
To modify the thermal settings:
1.
In the iDRAC Web interface, go to Overview → Hardware → Fans → Setup.
The Fan Setup page is displayed.
2. Specify the following:
• Thermal Profile — Select the thermal profile:
– Default Thermal Profile Settings — Implies that the thermal algorithm uses the same system profile settings that is
defined under System BIOS → System BIOS Settings.System Profile Settings page.
By default, this is set to Default Thermal Profile Settings. You can also select a custom algorithm, which is independent of
the BIOS profile. The options available are:
– Maximum Performance (Performance Optimized) :
* Reduced probability of memory or CPU throttling.
* Increased probability of turbo mode activation.
* Generally, higher fan speeds at idle and stress loads.
– Minimum Power (Performance per Watt Optimized):
* Optimized for lowest system power consumption based on optimum fan power state.
* Generally, lower fan speeds at idle and stress loads.
NOTE: Selecting Maximum Performance or Minimum Power, overrides thermal settings associated to System
Profile setting under System BIOS → System BIOS Settings.System Profile Settings page.
• Maximum Exhaust Temperature Limit — From the drop-down menu, select the maximum exhaust air temperature. The
values are displayed based on the system.
The default value is Default, 70°C (158 °F).
This option allows the system fans speeds to change such that the exhaust temperature does not exceed the selected
exhaust temperature limit. This cannot always be guaranteed under all system operating conditions due to dependency on
system load and system cooling capability.
• Fan Speed Offset — Selecting this option allows additional cooling to the server. In case hardware is added (example, new
PCIe cards), it may require additional cooling. A fan speed offset causes fan speeds to increase (by the offset % value)
over baseline fan speeds calculated by the Thermal Control algorithm. Possible values are:
– 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.
• 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.
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