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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)
2 Bronze
2 Bronze
960

Hmmm - updated the graphics driver and 1601 driver but no change.  Will have to look at display link.

2 Bronze
2 Bronze
960

Now running latest 1601, Display link, wireless hub, and intel graphic driver and there's no change to CPU temps or fan speed.

3 Silver
960

The only difference I note between my machine and what others describe is that I did a clean install of Windows 8 and no upgrade and I am not using the factory image. I re-installed from scratch when the new WiGig package was released. The fans are still coming on during a load but are much quieter than before and never get loud even when watching HD content using the d5000 dock.

**Just wanted to update this to make note of any differences I am aware of that may assist others working on this issue**

I also did not install the Intel Chipset package for the USB controllers. They are still at the Standard Enhanced PCI to USB Host Controller. The Intel USB 3.0 drivers installed automatically as they are in the default Windows 8 build image. My Storage Controllers are also installed as the Microsoft Storage Spaces Controller, which is the new default from Microsoft with Windows 8, and the Intel Mobile Express Chipset SATA RAID Controller. Additionally, I am using UEFI.


When I did a clean install, I purposefully installed NO additional drivers with the exception of the audio packages for Intel Display Audio and IDT High Definition Audio CODEC as well as the packages mentioned previously for DisplayLink and WiGiG. The Intel Display 15.31 package was not installed until a couple days ago when the display began to get a bit wonky, which was immediately fixed with the new version. Numerous drivers did install on their own with Windows Update. I purposefully only used Windows Update for the driver installations.

I also note that I have altered some of the Power Options but am unsure if this made any difference. USB selective suspend is disabled; wireless adapter settings for power saving mode are at low power saving; and PCI Express Link State Power Mangement is Off. Doubt those are making any difference but I did want to note them here.

I would suggest taking a peek at your list in Device Manager for the things I list above to see if you note any differences? I am curious to know if I install a package or uninstall something if the fan issue returns. When the fans do come on, again they are much quieter then before, the heat is definitely emanating from the 1601 card and not the processor or graphics.

2 Bronze
2 Bronze
960

I've done some characterization of the fan behavior.  It looks like there is hysteresis of around 8C.  Once core (or GPU?) temp is above ~58C for ~30 seconds the fan kicks in.  Then it stays on until the temp drops below ~50C for ~30 seconds.  Problem is that this doesn't really happen - the temp is staying between 50 and 60C under normal conditions.   Also given the temp behavior I'd like to see a "quiet fan" option where it isn't running at 4000RPM.   Note there are other trip points where the fan is even faster, but I can only get that running something like prime95.

As far as drivers go I don't know - the WiFi driver is up to date.  I haven't seen any correlation between radio on/disabled and temp, but I can experiment.  

2 Bronze
2 Bronze
960

Update - I've learned two things:

1) My laptop had a bad fan which was generating more noise than what was expected.  We have another 6430U and while the fan is running it isn't as loud.  We suspect a bad bearing in the loud laptop, and have ordered a replacement fan.  It is trivial to replace the fan.

2) Our image didn't have the Dell Feature Enhancement Pack.  Once I installed that a new category appears in Power options which allows me to assign the fan profile to "quiet".  This changes the set points so the fan is much more reasonable.  On the downside it does reduce the performance slightly, but not a huge deal.

3 Silver
960

I do not have the Dell Feature Enhancement Pack installed as I prefer the Windows 8 default onscreen notifications so that is not allowing my fan to be quiet. Awesome that a part replacement can possibly solve the issue!

2 Bronze
2 Bronze
960

I just received this laptop at work and I am also experience the constant loud fan issue.  It is rather annoying to hear a loud fan in a quiet office when there is nothing happening on my laptop except outlook.

I checked the BIOS and couldn't find any settings.  I also got speedfan working, but as soon as I modified the fan speed, something else hijacks the fan and puts it loud again.

This thing is brand new, so I'm not sure what the deal is.  Hopefully there is a fix in the works!

3 Silver
944

A prior poster stated there are fan options in the Dell Feature Enhancement Pack. Do you have that installed? If not, you can find it here.

2 Bronze
2 Bronze
944

Thanks, daova2 - I do have this installed.  I played with the various fan options and noticed the fan goes quiet when I switch the setting, but then it ramps right up again regardless of setting (even on quiet mode).

3 Silver
944

Do you have the latest Dell Wireless dock software or are you using the wireless dock?

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