DragonChase :
Clock speed is the speed of per core.
😉 i dont think theres more to add here but here you go:
http://en.wikipedia.org/wiki/Clock_rate
Quad core = 4 cores
Quad translated = 4
Speed per core 3 ghz = total for quad core 16Ghz
if only it was that simply. the "speed" is actually how much "data" it can run through every cycle.
To understand a CPU down to the details can be very difficult, as many things becomes a factor.