"Carsten Mueller" <newsman@eishockeygott.de> wrote in message
news:bjpiov$ltnr0$2@ID-200859.news.uni-berlin.de...

Nick M V Salmon wrote:

P4 can 'throttle' itself when it gets too hot, ie. slow itself down.
This last month in Europe has been HOT - has your P4-M been running
hot & self throttling..?

Damn. That could be it. It would explain inconsistent processing times at
constant CPU usage. Actually I live in Thailand (yes, a pretty hot

country)

but my computer survived the hot season without any problems.

IMHO, Nick's suggestion is a valid one. When I radically OC, my P4C starts
throttling back @ ~60*C, not the 67 - 70*C commonly referred to in the Intel
specs. This error margin may be due to my monitoring utility (AsusProbe),
but I don't know for sure.

The common cpu speed/spec utilities (WCPUID, CPU-Z, etc.,) will not
report 'throttling back. They simply report the result of your FSB*cpu
multiplier. When throttling back occurs, the clock speed remains the same,
but your cpu will start eliminating some cycles internally, ie., every 4th
or 5th one, etc. As temps increase the cpu will eliminate more cycles, up to
40 - 60%. IIRC. Meanwhile, your apps may still be running fine, though
slower (mine did). There's a pretty good technical explaqnation of this on
the Intel site if you do some digging.

Pop open your task manager, and check out your cpu usage graphs. Under
heavy throttling down, you'll notice that the green cpu usage line, which is
normally flat and clean at the top of the graph, around 100%, will be
fluctuating & spiking down, similar to a 'saw-tooth' wave in an O'scope, if
you've ever used one.

Also, in the taskmanger, under 'view', tick 'show kernel times'. It should
normally be a red, slightly wavy line, staying under the 1st green line
(20%), in the cpu graph(s), under normal usage, when not opening apps.
When I've overheated, my kernel graphing was extremely erratic and spiked
quite high (50 - 60%). At least these have been my experiences.

If you are overheating, and you use a utility that shows performance times,
like Setspy does, you might note the time when it's running slow. Then shut
down for a significant period of time, and restart. If the time initially is
as quick as before the problem, but then later slows down, that would lead
me to believe you have an overheating problem.

I guess you could always toss the running laptop in the freezer for a few
minutes while the problem is occurring, and see if it's faster when you take
it out, but I'd probably check the operating temp parameters for the HDD
first!!!

If you ARE overheating, time to clean up the 'ol fan dust filter(s), heat
sink(s), and check for proper fan operation or air flow obstructions.
Unfortunately, I've never owned a notebook, so I can't help more.

HTH
--
Strat�




















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