  The modification of Amdahl's law for the case of increment of processor
elements in a computer system is considered. The coefficient $k$ linking
accelerations of parallel and parallel specialized computer systems is
determined. The limiting values of the coefficient are investigated and its
theoretical maximum is calculated. It is proved that $k$ > 1 for any positive
increment of processor elements. The obtained formulas are combined into a
single method allowing to determine the maximum theoretical acceleration of a
parallel specialized computer system in comparison with the acceleration of a
minimal parallel computer system. The method is tested on Apriori, k-nearest
neighbors, CDF 9/7, fast Fourier transform and naive Bayesian classifier
algorithms.
