High CPU level

Hello i install XBMC 12 version on the pi (type B)
why even at "rest" (when no movie is on) i see cpu level on 94%
I think its too much any reason ?

That is the way XBMC works, it constantly refreshes the screen whether displaying any video content or not. So be careful about bumping up any overclock settings (by default Rasbmc uses 800 MHz with force_turbo).

anything to do about it ?

Don't use the "system info" screen to measure cpu. Log in and use 'top' instead, for example:

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%Cpu(s): 22.1 us,  1.3 sy,  0.0 ni, 76.2 id,  0.0 wa,  0.0 hi,  0.3 si,  0.0 st


Raspbmc, idle, currently running at 840mhz:

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pi@raspbmc:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
840000