[OT] CPU and GHz

[Misko <adatrg-mlist@yahoo.com.au>]

I am just curious!
Todays computers are running on high clock frequencies.
If I have CPU that runs on (let say) 1 GHz what parts of hardware
are actually running on this speed? (except crystal :)
I understand that memory chips are much slower than CPU so every
time that CPU need data that is not in cache it must slow down.
I also read somewhere that CPU is internally dividing clock impulses
and run on slower speed that it is advertised.

So where is this high speed used?
Thanks
Misko