CPU Speed keeps changing

Hey Guys,

i got a vps in germany which has a strange behavior. The CPU Speed keeps changing. Is that normal?

model name      : Intel(R) Core(TM) i7-4930K CPU @ 3.40GHz
Fri Jan 23 11:26:35 MSK 2015
cpu MHz         : 2550.750
cpu MHz         : 900.000
Fri Jan 23 11:27:06 MSK 2015
cpu MHz         : 2550.750
cpu MHz         : 1050.000
Fri Jan 23 11:27:36 MSK 2015
cpu MHz         : 900.000
cpu MHz         : 900.000
Fri Jan 23 11:28:06 MSK 2015
cpu MHz         : 2175.000
cpu MHz         : 2550.750
Fri Jan 23 11:28:36 MSK 2015
cpu MHz         : 900.000
cpu MHz         : 2550.750
Fri Jan 23 11:29:06 MSK 2015
cpu MHz         : 2100.000
cpu MHz         : 900.000
Fri Jan 23 11:29:36 MSK 2015
cpu MHz         : 2550.750
cpu MHz         : 2550.750

Regards, Faulwurf