There's a comment in the BUGS section of the OpenBSD cpu(4) man page:
* It's an Intel-specific bug, and both FreeBSD and OpenBSD have the same problem.
OR
* It's an OpenBSD specific problem, thus it doesn't apply to FreeBSD.
I'm wondering, whetherDue to the way in which thermal information is reported on Intel processors, the temperature may be off by exactly +/-15 degrees C.
* It's an Intel-specific bug, and both FreeBSD and OpenBSD have the same problem.
OR
* It's an OpenBSD specific problem, thus it doesn't apply to FreeBSD.