Wednesday, February 23, 2011

Why not to increase the clock speed of CPUs ?

There is a question which i think, might have come to your mind. Why are we not concentrating upon increasing the clock frequency of all the CPUs if at the end, the thing that matters is the speed only?
Then my answer is that one can not increase the clock speed of a processor upto certain level. I'll take an example here.
Single Core Processor
Consider a CPU running at a clock speed of 5 GHz and one running at 2.5 GHz.(Clock speed is the frequency at which a transistor is turned on and off.)
The energy dissipated in the form of heat is in direct relation with the frequency at which the transistors are running.