PowerPC frequency

["FASSINO Jean-Philippe FTRD/DTL/GRE" <jeanphilippe.fassino@rd.francetelecom.com>]

Title: PowerPC frequency

Hi,

I bought the new PowerBook 800Mhz and i see that Linux detect only 667Mhz
(seen in /proc/cpuinfo and in
/proc/device-tree/cpus/PowerPC,G4/clock-frequency)
whereas MacOS X see 800Mhz.
Does someone see that before ?
Is it a Linux problem or is it a Apple which not give me correct powerbook ?
In the second case, why MacOS X say 800Mhz ?

Thanks

JP