super300 :
Okay, thanks.
And besides that, does unstable frequency have any effects?
And what about voltage? Of course that unstable voltage is not good, but what is considered as an unstable voltage?
Constantly changing frequency and voltage is just fine. I leave SpeedStep enabled to let it do just that, for lower heat output. No harm in it at all.
It
may cause instability at extreme overclocks, but at any normal OC, it's just fine. And it definitely won't damage anything. It's meant to do that.
The only thing that may be a problem is if the VRM's aren't great, so they won't (or can't) provide stable load voltage, but there's nothing you can do about that, except get a higher quality motherboard.