A purely logical being would not care for others sufferings because others feelings would irrelevent to its function. Pure intellect does not lead to benevolence or empathy. In fact, concepts such as "mercy" or "kindness" are hinderance to logic and intellect, since such feelings cloud evaluation of facts.

Besides, in order to define "good" as existing as objective principle, you would necessarily need to invoke law-giver external to man. If your premise is "good" is subjective, then good or evil does not exist and the super-intelligence need not bother with such human concepts.