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From: joby on 23 Apr 2008 15:45
I've got an asus P5N-D MoBo and the BIOS reports the CPU running at 50C
but the PC Probe software that came with the MoBo reports the CPU
running at 42C. Should I believe the BIOS # over the probe SW? I have no
idea why the two should report different #s, but then again, I may not
know something about where the Probe SW pulls the data. thanks for any
enlightenment.
From: Ian D on 23 Apr 2008 20:02

"joby" <uw324535gfgqwrgv(a)gmail.com> wrote in message
news:Mc6dnSjbLa11DJLVnZ2dnUVZ_h6hnZ2d(a)supernews.com...
> I've got an asus P5N-D MoBo and the BIOS reports the CPU running at 50C
> but the PC Probe software that came with the MoBo reports the CPU running
> at 42C. Should I believe the BIOS # over the probe SW? I have no idea why
> the two should report different #s, but then again, I may not know
> something about where the Probe SW pulls the data. thanks for any
> enlightenment.

There's a setting in the BIOS called C1E which is enabled by default.
This setting runs the CPUat a slower speed with light load, and
increases it to full speed when the OS requires performance.
For example a 2.4 GHz E6600 runs at 6X multiplier, or 1600 MHz
on light demand, and at the full 9X for 2400 MHz on high demand.
When the system first boots up the CPU runs at full speed until
the OS loads, therefore the BIOS will show a higher temp. If you
disable C1E, the CPU will run at full speed at all times, so the two
readings should be closer. Also, you will find that Windows will
be a bit snappier. The only downside will be that the CPU will run
a few degrees hotter, in your case 50C vs 42C. No harm done.

ID


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