You can't compare the speed of a computer to the speed of a human. Only because a human is slow doesn't mean that the human is stupid, nor computer are smarter. The electric current in a integrated circuit acts near the speed of light. Light itself is also very fast but not very intelligent.
> [...] the world Chess champion has been a computer.
Again, this is a matter of speed. If you give a human being the same amount of time in relation what a computer had taken to calculate the same steps of a chess game it would be a more true comparsion of intelligence.
> Humans have almost no memory
That's because the human brain isn't trained and not used. We use almost 10% of our brain. So this comparsion also hinks.
> The face recognition software that Facebook uses can tell the faces of millions of people apart.
And again, this is only a matter of training and not a matter of intelligence.