CPU Speed AMD XP-M 2800+

[Frank Staals]

Hey,

I have an Acer Aspire 1356 LCi laptop and I'm running FreeBSD 
5.4-Release. In my laptop I have an AMD XP-M 2800+ which clockspeed 
should be around 2100 Mhz according to Wikipedia ( 
http://en.wikipedia.org/wiki/List_of_AMD_Athlon_XP_microprocessors#Athlon_XP-M_.22Barton.22_.28Desktop_Replacement.2C_72W_TDP.2C_Socket_A.29 
) allthough I recently found out is is only running at +/- 800 Mhz :

frank at Riza$ cat /var/run/dmesg.boot | grep CPU
CPU: Mobile AMD Athlon(tm) XP 2800+ (796.10-MHz 686-class CPU)
cpu0: <ACPI CPU (3 Cx states)> on acpi0

Because of this I have problems decoding/playing an AVC ( H264 ) video 
file. Is there a way to throttle the CPU speed, since it is probably 
always running on low-power mode ?

Thanks in advance

-- 
-Frank Staals