Apple G5 Quad - thermal mgmt issues?

[Rob Ballantyne]

Hi All,

  I had a quick search of the bugs.freebsd.org database and couldn't find
anything but I wasn't sure I was searching properly.

  I'm having my G5 Quad shutdown while trying to compile packages after a
fresh 11.1 install.  I've had thermal mgmt issues in the past but not for
a long time.

  Are there any known issues currently? Or, should I suspect my machine's
hardware is failing?

Thanks!
Rob