Adjusting fan speed: Difference between revisions

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== Introduction ==
== Introduction ==


Starting with Dell's PowerEdge 12th generation servers, Dell has introduced a fan speed offset setting that enables fan speed to be increased and decreased. 3rd party add-in cards - such as Netscout's "Sniddely" analysis card found on TruView Packet (TVP) and TruView Appliance (TVA) - need increased fan speed to provide additional cooling.
Together with PowerEdge 12th generation servers, Dell introduced the fan speed offset setting enabling fan speed to be increased and decreased with respect to the optimal fan speed in accordance with the thermal profile settings. High power third party add-in cards - such as Netscout's "Sniddely" analysis card found on TruView Packet (TVP) and TruView Appliance (TVA) - need increased fan speed to provide additional cooling.
 
Netscout has decided to apply a Termal Profile for maximum performance which leads to maximum fan speed and the corresponding sound level of nearly 81dBA.


Netscout has decided to apply a thermal profile for maximum performance which leads to permanent maximum fan speed and a corresponding sound level of nearly 81dBA!


 


== Solution ==
== Solution ==
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{{#invoke:Message box|ambox |type=info|text=Dell changed the iDRAC configuration menu ever so slightly with every new release of the firmware. The way to configure this setting may not be exactly the same as stated below.}}
{{#invoke:Message box|ambox |type=info|text=Dell changed the iDRAC configuration menu ever so slightly with every new release of the firmware. The way to configure this setting may not be exactly the same as described below. This article was written with iDRAC version 2.50.50 installed.}}
 
 
 
=== Setting the fan speed offset ===
 
The thermal profile and fan speed offset can be configured via iDRAC Settings during boot or via the iDRAC Web UI.
 
iDRAC Settings:
 
*At boot, press '''<F2>'''&nbsp;
*Select '''iDRAC Settings''', then&nbsp;'''Thermal '''all way down the list
 
iDRAC Web UI:
 
*Login
*In the left panel expand '''Overview''' > '''Hardware'''
*Select '''Fans''' in the left and '''Setup''' in the right panel
 
We recommend the following settings:
 
Termal Profile: '''Default Thermal Profile'''
 
Fan Speed Offset: '''High (+55%)'''


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The Fan Speed Setting menu is found in the iDRAC Settings&nbsp;menu. It is not configurable via&nbsp;the iDRAC Web UI.
=== Controlling the temperature ===


*During BIOS boot, press <F2>&nbsp;
After about fifteen (15) minutes, check the temperature of the CPU. It should not be above 55°C. Increase fan speed if needed.&nbsp;
*Select '''iDRAC Settings''', then&nbsp;'''Thermal'''
*Click on the menu'''&nbsp;Cooling Options'''


The Fan Speed Offset setting allows the user to select Low Offset and High Offset.
iDRAC Web UI:


When the Cooling Option is set to Default, the fan speed will be set to the value calculated by the Dell Themal Controller.&nbsp;
*Login
*In the left panel expand '''Overview''' > '''Server'''
*Select '''Power / Thermal''' in the left and '''Temperatures''' in the right panel


The Low Fan Speed Offset drives fan speeds to a moderate fan speed (approx. 50%), and the High Fan Speed Offset drives fan speeds close to full speed (approx. 90-100%).
When the System Board Inlet Temperature changes, the fan speed should increase automatically.


For PCIe cards with power levels beteen 15W and 75W, it is recommended that '''Fan Speed Offset Low'''&nbsp;is selected. The Sniddely analysis card has&nbsp;a maximum power rating of 25.2W.
&nbsp;


*Set Fan Speed Offset to "'''Low'''"
&nbsp;
*Make sure to save the new setting when exiting system setup.


For cards expected to exceed 75W per PCIe Slot, fan speed offset of "High" is recommended.
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Latest revision as of 18:51, 20 July 2018

Introduction

Together with PowerEdge 12th generation servers, Dell introduced the fan speed offset setting enabling fan speed to be increased and decreased with respect to the optimal fan speed in accordance with the thermal profile settings. High power third party add-in cards - such as Netscout's "Sniddely" analysis card found on TruView Packet (TVP) and TruView Appliance (TVA) - need increased fan speed to provide additional cooling.

Netscout has decided to apply a thermal profile for maximum performance which leads to permanent maximum fan speed and a corresponding sound level of nearly 81dBA!

 

Solution

 

 

 

Setting the fan speed offset

The thermal profile and fan speed offset can be configured via iDRAC Settings during boot or via the iDRAC Web UI.

iDRAC Settings:

  • At boot, press <F2> 
  • Select iDRAC Settings, then Thermal all way down the list

iDRAC Web UI:

  • Login
  • In the left panel expand Overview > Hardware
  • Select Fans in the left and Setup in the right panel

We recommend the following settings:

Termal Profile: Default Thermal Profile

Fan Speed Offset: High (+55%)

 

Controlling the temperature

After about fifteen (15) minutes, check the temperature of the CPU. It should not be above 55°C. Increase fan speed if needed. 

iDRAC Web UI:

  • Login
  • In the left panel expand Overview > Server
  • Select Power / Thermal in the left and Temperatures in the right panel

When the System Board Inlet Temperature changes, the fan speed should increase automatically.

 

 

 

 

 

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