Re: Kamikaze CPU fan - ONLY in XP and if no 3rd party tools are installed!
- From: tstaddon@xxxxxxxxx
- Date: Mon, 06 Aug 2007 21:01:33 -0000
Hi,
Thanks for the replies.
Just to cover the points:
Bob: You are right, but playing devil's advocate here... Microsoft
were pushing for ACPI to become the de-facto standard for new
motherboards, a long time ago. They have a standard interface for
accessing the motherboard sensors.
For that reason, IMO it's a very surprising omission for Microsoft to
make - to develop APIs to pull sensor readings off the motherboard,
but then to avoid doing anything with them on the basis that this is
the mobo manufacturer's job.
Brian: There is a CPU THRM-Throttling setting but it's only there
because I modded the BIOS and put it in! It's one of the few
configurable options that can be made visible on this board - even H/W
Monitoring, while available in the BIOS ROM itself, is completely
locked out of the user interface. This is a manufacturer override and
to be honest I cannot for the life of me figure out why MSI did that
on boards sold to OEMs in Europe, particularly Advent and Medion, for
use in SFF PCs (which are by definition more prone to cooling issues).
Mine's a Philips Freeline LS2100 by the way. As for MSI specific
software; I've got something on there that monitors the drivers but I
haven't seen a hardware monitoring tool for this board.
Paul: Thanks very much for the detailed information.
My motherboard isn't directly supported by SpeedFan, MBM5, or CPUCool,
so the functionality of these tools is limited. Even so, I can at
least switch the fan back to full speed before the processor gets
toasted (CPUCool seems to be more reliable than SpeedFan though).
Windows on its own would merrily leave the fan idling at 7% of its
maximum speed.
Here's my beef. Even without these third party tools I can check the
CPU temperature and fan speed, and force a shutdown of my PC if it
overheats, with nothing more complicated than writing a couple of
dozen lines of VB script in NOTEPAD. Clearly there IS an interface to
these sensors... I've been using WMI/WBEM for "basic" low level
monitoring for years.
I stress again: it is ONLY XP that seems to require me to do something
as drastic as this. If I boot into DOS/Win9x, or Linux, or even into
Windows 2000 using a standard non-ACPI HAL, on the exact same PC, the
CPU fan just does what it's supposed to do - ie leave the fan running.
Only in XP do I see it slow down to a crawl and remain idling till
either I reboot the machine or it switches itself off due to
overheating.
If Windows has absolutely no hand in this whatsoever, then why is it
the ONLY operating system which suffers from this issue and is also
the only one where I have to fall back on a third party tool to solve
it?
.
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