Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have recently installed a Gigabyte P43-ES3G motherboard on my computer with a Core 2 Quad Q6600 and whenever I try to run Speedfan my computer shuts down. Has anyone else experienced similar issues with speedfan or know what could cause this? I am running Windows 7 64-bit. Thanks

share|improve this question
I was running Win7 64-bit when my computer just went completely black, with nothing in the error logs. Didn't know what it was until I read this post. Did your machine also completely black out? No shutdown screen, just a black screen? – leeand00 Jul 25 '12 at 2:13

Haven't had that problem before, but found a couple of command line switches you can try from this article:


SpeedFan uses standard calls to the OS to access S.M.A.R.T. info. Unfortunately, some drivers do not work fine and cause the whole system to crash when queried the standard way. Such drivers included some from Silicon Image and some others from nVidia (for nForce 4). You will see that every S.M.A.R.T. enabled tool will crash with such drivers. This switch will prevent SpeedFan from accessing S.M.A.R.T.. You will not see any info about your IDE or SATA hard disks.

The /NOSUPERIO switch

The SuperIO chip contains several functionalities. From the keyboard interface, to floppy, serial and parallel ports, power management and so on. Some SuperIO chips also contain hardware monitoring capabilities and/or fan control support. This is the reason why SpeedFan tries to automatically identify them. This works most of the time, but it looks like that some manufacturers are using custom devices and configurations that collide with this detection process. Such manufacturers include DELL (but not all DELL products). If SpeedFan hangs or causes your system to crash, this switch will be a good candidate for a fix.

share|improve this answer
I've got a Gigabyte G41M machine with the same issue. These flags don't resolve the problem :/ – brianbaligad Mar 13 '11 at 3:18
Yup, the /NOSMARTSCAN switch worked for me on my PENGATRON Corp. G60VX 1.0 – leeand00 Jul 25 '12 at 2:11

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.