This article presents results of experiments, which were carried out to discover the impact of memory effect on computing time. A series of runs were conducted to execute sequential and parallel algorithm of solving system of linear equations (SLE) with the steepest-descent method. The quantitative evaluation of parallel algorithm realization exponents in different ranks SLE solving is given. Dependences and factors, which have impact on computing time, are detected. Parallel computing was implemented in the Distributed computing system with programmable structure of Novosibirsk State Technical University at Computer Engineering Department