MacBook Pro: The Thermal Paste Question
Subject:   Nice write up
Date:   2006-05-23 21:20:28
From:   jdb8167
Nice write up, thanks for helping defuse this latest myth.

I do have a couple of points. While unimportant to your experiment two ways to actually crank up the heat on the CPU better than the yes >/dev/null are:

echo 'scale=10000;4*a(1);' |bc -l -q

This calculates Pi to 10,000 digits. Either run with an & and up arrow to run again on a second thread or with two Terminal windows.

The other is to use the openssl speed function. This reportedly stresses the CPU pretty well and is easier to type:

openssl speed &

The other point was you can get a real reading on the CPU temperature with a kernel extension written by,cat_view/gid,26/

You can find it nicely packaged version called CoreDuoTemp. It with a GUI application to measure temperatures and the current SpeedStep CPU frequency here:

Thanks again for this. It is not something I was willing to do with my MacBook Pro but I was curious to find out if there really was something wrong with Apple's build process. I'm pretty now confident that there really isn't.

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  1. Nice write up
    2006-05-24 17:09:05  chambone [View]

  2. James Duncan Davidson photo Nice write up
    2006-05-24 13:21:21  James Duncan Davidson | O'Reilly AuthorO'Reilly Blogger [View]

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