iBook G4 - wrong CPU speed?

[Torfinn Ingolfsen]

I just upgraded my iBook G4[1] to FreeBSD 9.1-prerelease.

Before the upgrade, dmesg showed this for the CPU:
cpu0: Motorola PowerPC 7447A revision 1.5, 713.92 MHz
cpu0: Features 9c000000<PPC32,ALTIVEC,FPU,MMU>
cpu0: HID0 8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>

The upgrade took a long time, so I could believe it was running at that speed.

And after the upgrade, it still shows this:
root at kg-ibook# uname -a
FreeBSD kg-ibook.kg4.no 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #0: Thu Jul 19 11:26:56 CEST 2012 
    root at kg-ibook.kg4.no:/usr/obj/usr/src/sys/GENERIC  powerpc
root at kg-ibook# dmesg | grep cpu
cpu0: Motorola PowerPC 7447A revision 1.5, 713.92 MHz
cpu0: Features 9c000000<PPC32,ALTIVEC,FPU,MMU>
cpu0: HID0 8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>
cpulist0: <Open Firmware CPU Group> on nexus0
cpu0: <Open Firmware CPU> on cpulist0
dfs0: <Dynamic Frequency Switching> on cpu0

But the CPU in this thing is supposedly running at 1.42 GHz, so why is it showing the wrong speed?
Details, dmesg output and more at the FreeBSD page for this machine[2].

References:
1) http://sites.google.com/site/tingox/ibook_g4
2) http://sites.google.com/site/tingox/ibook_g4_freebsd
-- 
Torfinn Ingolfsen <torfinn.ingolfsen at getmail.no>