Thread: laptop slowdown
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Old 2003-07-22, 15:03   #6
trif's Avatar
Aug 2002

20210 Posts

Originally Posted by nomadicus
Thanks Trif/Xyzzy,
What I observed fits very well with the 12.5% off duty cycle. I have iterations set at 10,000 which displays the iteration times every 2hours+. I take all that to mean it switched from 100% down to 87.5% (or more) and back over a long period of time.
That is really great that the P4 protects itself up to 135C.
I wonder if the AMD XP1700 (and faster) do this?
In terms of heat management, maybe the extra cost, in general, of a P4 is worth buying over the AMD (I'm an AMD fan, except for prime95 work, but nuggets like this may will sway me towards P4's).
AMD has a diode that can be used to signal the motherboard that the chip is too hot and the system should shut down, but it doesn't have the throttling feature. I buy AMD for my desktop systems (price/performance can't be beat), but my laptop is an Intel chip. I think the throttling is absolutely essential in a laptop because laptop fans are notoriously flaky, and the throttling will protect the chip while still leaving the system usable. The fan on my laptop is busted, and while I can keep it running full speed for Prime95 by putting a secondary fan behind the vent, I can still use it as a laptop away from the extra fan, although it will throttle down.

So I'd go by the demands that will be made of the processor. If you need absolute thermal protection, buy the Intel. If you don't then the chance of having a freak accident with an Athlon and having to replace it doesn't outweigh the price differential that you'd have to pay for equivalent performance on the Intel (not counting SSE2 friendly apps like Prime95).
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