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October 27th, 2017 05:00

Dell PowerEdge fan speed - change fanspeed offset

The BMC/iDRAC in is programmed to set fan speed min/max and adjust values based on factors like ambient temperature and system configuration. Depending on configuration the system may run the fans at higher RPMs regardless of any detected temperature. But...

If you use server at office, the noise become very anoying. If you set Maximum Performance in BIOS (Power Management),  there is no way to adjust fan speed because when server start, IDrac set Fan Speed Offset to Max...

Many people advise changing the fans or changing the BIOS, but I found that very risky...  The way i used is changing the thermal FanSpeed Offset value in IDrac.

Fan speed and temp before adjusting...

SSH - iDrac...


Get SpeedOffset value:

racadm get system.thermalsettings.FanSpeedOffset

Set SpeedOffset value:

racadm set system.thermalsettings.FanSpeedOffset X

The X values are:

  • 0 - Low Fan Speed
  • 1 - High Fan Speed
  • 2 - Medium Fan Speed
  • 3 - Max Fan Speed
  • 255 - None

Fan speed and temp after adjusting...

There is also benefit with power consumption. Before adjusting, server used about 250W and now is constantly on 120W...

I used this on PowerEdge R620 but this adjustment can also be used on other Dell servers with noisy fans...

7 Technologist


16.3K Posts

October 27th, 2017 15:00

Correction ... the simple act of replacing fans is not risky. Finding a quieter fan that will WORK can be problematic, but not risky.

7 Technologist


16.3K Posts

October 27th, 2017 15:00

Many people advise changing the fans or changing the BIOS, but I found that very risky

Hmm ... neither of these are "risky" when done correctly.

October 27th, 2017 16:00

I agree:) But, if you still have warranty on your server, every modification is risky:)

August 22nd, 2018 04:00

hi, how do i access the ssh - idrac console

1 Message

October 5th, 2018 02:00

Is this command only available on new RAC? becoz I am using RAC5 can only ssh but dose not work for this command.

1 Message

November 22nd, 2018 04:00

Hi. This solution works great, only issue is that every time I reboot it reverts fans to 100%. Is there any way to make this setting permanent? Thank you.

1 Message

March 9th, 2019 01:00

This seems to be an idrac7+ only feature.  Idrac6 doesn't recognize the commands... any ideas on if something like this is possible with idrac6 servers (mine's an R510 running the idrac 6 2.92 latest and greatest)

1 Message

May 5th, 2019 03:00


You found any solutions?

1 Rookie


53 Posts

October 15th, 2020 05:00


can i run this cmds on the R900 ?

1 Message

March 2nd, 2021 11:00

I created an account here, just to say THANK YOU!

Been trying to resolve my loud fan noise issue for the past 2 days, trying out different SAS controller cards and HD configurations (because the noise started after adding some SDDs to my T620).

This works on a PowerEdge T620 with all latest firmware.

1 Message

June 28th, 2021 14:00

Hi Marc.. For me also same problem. The Fan speed is too high. I tried to login putty using ssh. But it is showing access denied. Can you please tell me which ip has to be used for ssh putty login.... Thanks.. 

1 Message

December 4th, 2021 08:00

you could check your router to find iDRAC IP address

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