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Last reply by 12-15-2015 Unsolved
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Dell Latitude 6430u - Fan Speed

Hi,

I´m using Dell Latitude 6430u for few days. I have upgraded from Win7 to Win8. Everything works fine, but the CPU fan seems to be very noisy already at low ultrabook load. I have upgraded BIOS to the latest version (http://www.dell.com/support/drivers/us/en/04/Product/latitude-6430u-ultrabook ), but this problem problem is still present.

Have you some advice, how to reduce fan speed?

Thank you!

Replies (86)
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727

You probably already noted this, but just in case...  the Dell Enhanced Settings in the Power Options > Advanced Settings are specific to On battery and Plugged In.  I have "on battery" set to "quiet" and "plugged in" to standard.  I also noticed the setting didn't "take", and then realized I was plugged in.  As soon as I removed external power the fan turned off.  Note that in quiet mode the fan still turns on, but isn't as aggressive.  

I also replaced the fan and the replacement was a different manufacturer.  Previously I had a loud fan that sounded like something from a dentist (high pitch whine).  The new fan is much more quiet, and I hear air moving, but not the whine of the fan bearings.  I'm wondering if there was a change made in manufacturer/lot of fans.

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727

I am not using the wireless dock - just have USB devices and a monitor plugged in.

I did switch both the "on battery" and "plugged in" settings and didn't hear too much of a difference; the fan still runs at a constant 4500 RPM at idle.  I do just hear the airflow moving which is alone enough to annoy me.  As someone who builds commuters, I strive to have my components as quiet as possible especially when they are idling.

I have been monitoring temps and have noticed this thing runs relatively hot. Between 50 and 60 degrees Celsius on idle and jumping up to 75 - 80 on medium load.  I think this thing just might not be designed the best.  I have a Macbook Pro at home that is a powerhouse but I can only hear the fan kick in on a heavy load.

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727

Did you try loading the latest Intel HD Graphics 4000 driver version 15.31?

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727

I did update the Intel HD Graphics to the latest 15.31 version - it seemed to help.  The fan hovers right around 4300 RPM now instead of 4500 RPM on the quiet mode.  Though once the fan turns on, it never seems to turn off.  I also updated the DisplayLink driver to the latest version.

Its interesting, before the temps climb above 55 degrees Celsius, the fan is turned off completely.  It would make sense to at least have it running at an inaudible 2000 RPM or so.  It's like the fan has an on or an off position.

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727

If you are not using the wireless dock, then you do not need any of the DisplayLink software/drivers. I would remove those. Are you running Windows 7 or 8? Did you install your own image or are you using the factory/OEM image from Dell?

Open Device Manager and let me know what it lists below Universal Serial Bus controllers. Does it show 'Standard Enhanced PCI to USB Host Controller' or something different below the Intel USB 3.0 eXtensible Host Controller?

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727

I actually use two USB devices that go from USB to DVI for an extra monitor - these also use the DisplayLink software.

I'm running Windows 7 Enterprise edition that our IT folks loaded on.  I'm guessing it is a stock setup with modifications here and there.  I didn't find 'Standard Enhanced PCI to USB Host Controller', just the USB 3.0 eXtensible Host Controller and USB 3.0 Root hub, and a few other USB hub mentions.

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727

Please try installing this Chipset driver to see if you get a difference. Barring that, bring it up to the IT department. They should be able to replace the fan for you to see if that makes a difference.

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734

Thanks daov2a, however that link appears to be broken.  Mind pasting the URL? I'll then give it a shot.

3 Silver
734

Fixed the prior post.

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734

No luck - I updated with the chipset driver you suggested and the fan still runs as it has been.

Another coworker is experiencing the same symptoms.  Again, it appears that the fan is functioning normally, it's just that it is constantly on after the laptop heats up above 55 Celsius or so and emits a constant airflow noise.

I've been reading other threads and it looks like it affects a variety of dell laptops - the thermal controls are set to have the fan on at a higher speed most of the time.  It is a BIOS setting that can't be easily modified.

So for the time being, I think I'm SOL unless Dell decides to release a BIOS update.  I appreciate all the troubleshooting help from the thread though.

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