Fan running full speed continuously

Question

I wasn't even using my computer when the fan kick in all on its own and began running full speed continuously.  It never stops.  I've rebooted.  I turn it off...then back on.  I thought it might be a virus and I scanned my computer a virus checker with the latest update (Norton).  It won't stop.   What to do??

Phil1234 · Answer

Now that is a new one! so my mean your system was powered down? or was it in hibernate or sleep mode? What system are we talking about btw?

Phil.

@hsvdog wrote:

I wasn't even using my computer when the fan kick in all on its own and began running full speed continuously. It never stops. I've rebooted. I turn it off...then back on. I thought it might be a virus and I scanned my computer a virus checker with the latest update (Norton). It won't stop.

What to do??

Phil1234 · Answer

Thanks for the info. What version of SM Bus and Video drivers are you using? and what are the temps of the cards when this happens?  Phil.

hsvdog · Answer

here's my system...XPS 600

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
           Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
       System Model: Dell DXG051
               BIOS: Phoenix ROM BIOS PLUS Version 1.10 A00
          Processor: Intel(R) Pentium(R) D CPU 3.00GHz (2 CPUs)
             Memory: 2046MB RAM
          Page File: 406MB used, 3531MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)

hsvdog · Answer

as far as the temp...I don't how to find the temp.

hsvdog · Answer

It wasn't turned off, or in hibernate or sleep mode. It was on. I just wasn't using it.

It's the two fans behind the dual 7800 gtx video cards. They just continuously run at high speed. I've taken them out and booted for a minute to see if that was the cause. Without those fans everything ran smooth. I quickly turned the computer off, reconnected the fans and the fans still run at high speed.

hsvdog · Answer

here's the video driver...

Driver Name: nv4_disp.dll
   Driver Version: 6.14.0010.8195 (English)
      DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 11/11/2005 13:47:00, 3924992 bytes
      WHQL Logo'd: Yes
WHQL Date Stamp: n/a

I'm afraid I don't know what a 'SM Bus' is. How do I get that info?

GuardianXPS · Answer

Also check the temperature in the room, if your over 75 degrees in that room then its going to cause the computer fans to run constantly.   Guardian

Phil1234 · Answer

The SMBUS driver is used to allow the motherboards chipset in your case the nVidia SLI to communicate with the entire system so it knows how to set things and allow efficient data transfer from all your systems cards and hard-drives. It's also known as the Nforce Chipset Driver.

To check the temp right click on your desktop and then choose Nvidia Display and then the monitor you have. This will bring up the Nvidia Control Panel and the temperature option will be there for you to check.

Phil.

@hsvdog wrote:

here's the video driver...

Driver Name: nv4_disp.dll
   Driver Version: 6.14.0010.8195 (English)
      DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 11/11/2005 13:47:00, 3924992 bytes
      WHQL Logo'd: Yes
WHQL Date Stamp: n/a

I'm afraid I don't know what a 'SM Bus' is. How do I get that info?

Aeterno · Answer

Just to make sure of something, is this the fans in the black plastic box inside the door (below the drives), the fans on the cards, or the fans in the green shroud over the heatsink?   If the system is cool (been off for a while) and they're fast when it boots up, there's probably something wrong with the temperature sensors somewhere.  If they lose contact with the sensors they usually spin up to full speed just in case.

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Fan running full speed continuously

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