About a week ago, I started Prime95, version 23.8.1, running on a HP Laptop, Pentium 4, 3GHz, Windows XP. During the first few days, the iteration time was about 0.065 sec., but in the past few days, it has started to creep upwards, and is now more than 0.09 sec. I am testing exponent 22681363.
What do you think this persistent upward creep means?
I just did an experiment. Turned the program off for several minutes, then back on. The iteration times that followed were: 0.042, 0.077, 0.084, 0.089 sec. Obviously the time goes up as the machine heats. Is this liable to be dangerous?
the P4 slows down various internal execution units as they get hot. Sounds like your laptop has insufficient cooling to be run at full speed for more than a few seconds.
as far as dangerous goes, running a chip hot can shorten its life, and that of components around it (capacitors etc). but it could run for years that way, there's no telling.
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