Computers have memory, both fast and slow, and they have processors. These are distinctly different systems, manufactured in completely different buildings from each other.
Human brains however co-mingle memory and processing. That’s why computers aren’t a very good metaphor for thinking about brains. The song Jingle Bells is not stored anywhere in your brain, but if you have it on your computer, it exists in a real physical location.
We don’t know how it is that we are intelligent, and duplicating our intelligence in a machine is even more problematic given how different computers and brain actually are.