Yes. God's power is infinite because the divine essence, through which God acts, is infinite.
Active power exists in God according to the measure in which He is actual.
And His actual existence is infinite, inasmuch as it is not limited by anything that receives it (Q7, A1).
It is not necessary that the infinite power of God should be manifested so as to produce an infinite effect. Yet even if it were to produce no effect, the power of God would not be ineffectual; because a thing is ineffectual which is ordained towards an end to which it does not attain. But the power of God is not ordered toward its effect as towards an end; rather, it is the end of the effect produced by it.