Work out dynamic power dissipation instantly with clear inputs, formula shown and shareable results.
Dynamic power is alpha x C x V squared x f. The quadratic voltage term is why dynamic voltage and frequency scaling is so effective: dropping from 1.0 V to 0.85 V cuts power by 28% at the same frequency, and reducing frequency lets voltage drop further still.
Dynamic power
P = alpha x C x V^2 x f
Power falls with V squared while performance falls only linearly with frequency, so reducing both gives a roughly cubic power saving for a linear performance loss.
The average fraction of clock cycles on which a node toggles. Typical logic is 0.05-0.15; the clock itself is 1.0.