That's just a restating of the Chinese room argument. Like Searle you're bamboozling yourself with scale. If I was put in a magnetic field of some kind that slowed down my physical and neurological processes by 1000x would I be any less conscious? Would I be any less a human being? It would seem so to people observing me for sure, but would it change my essential nature?
And as Searle responded to that argument you are bamboozling yourself with speed. There is nothing that prove that accelerating the computation to a given speed that will make the consciousness emerge.