I have a i7 4790k and I'm happy with it, (no overclock, 4.0Ghz) however this been like this since we got from the store, fans spins up so fast at boot/startup and then goes down to its normal speed in seconds, I know its normal, but what it does? A friend of mine told me "cpu does that to check stuff on motherboard, like everything is in order or not etc) is this true? It can detect anything if its wrong placement or errors like that?