Tugger the SLUGger!SLUG Mailing List Archives

RE: [SLUG] weird PC behaviour

Hi Dave,

You really need to keep the fan going on a PC; without it you can cook
This applies to any PC irrespective of what operating system it's running
On more modern ones, sometimes the BIOS detects the temperature on the mobo
/ CPU and will not allow boot it the temperature is over a certain amount
(whatever that is, varies from machine to machine).
On the older ones, the video often karks it first. It puts out maybe 7W of
heat and is not necessarily in the path of the fan.
Also at high temperature (say over 35 deg C) the disk media change physical
size compared to the head positioning hardware so the tracks ain't where
they used to be.
So if you write to it, you might not be able to read it again at a lower
Other effects for pentiums might include executing the wrong instructions
because the chip internal timing is also temperature dependent. Different
parts of the instruction might arrive at the (say) ALU at different times or
might be clocked into the wrong internal register because the setup times
are violated.



Jill Rowling, Snr Des. Eng. & Unix System Administrator
Eng. Systems Dept, Aristocrat Technologies Australia
3rd Floor, 77 Dunning Ave Rosebery NSW 2018
Phone: (02) 9697-4484 Fax: (02) 9663-1412 Email: rowling@xxxxxxxxxx

> -----Original Message-----
> From: Dave Fitch [mailto:davidf@xxxxxxxxxxxxxxxxxx]
> Sent: Monday, 5 February 2001 10:03
> To: slug@xxxxxxxxxxx
> Subject: [SLUG] weird PC behaviour
> Hi all,
> What happens when a PC CPU overheats?
> (it's a Cyrix/IBM P200)

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