Brain Power

Have you ever felt that your brain has had enough and needed a rest? I have.
The brain uses energy at a rate of about 25 Watts. That's without a muscle moving. With continuous physical exertion that might represent 20% of your body's energy consumption. No wonder your brain can tire. Could you run your brain at 100 Watts? I don't think so. You'd get a hot head.
What, I wonder, is the upper limit of knowledge that can be stored and effectively retrieved in the average human brain. I mean,: facts, recognitions, behaviors, memories.
No matter how fast a computer is - memory is limited by physical storage devices.
This same is true for the brain - in a way... The brain has an astounding 100 trillion neuron interconnections called synapses. These synaptic structures can change over time to create more and more complex associations within the brain. But just how much "knowledge" can it store?
The brain operates much more slowly in neuron firings/second than a computer's operations/sec, so a computer can do an unbelievable number of calculations on a mathematical level.
Perhaps this capability far exceeds what a brain could ever do. But the brain has a storage and modification ability that computers don't (yet). We learn. We learn search paradigms, mnemonic devices, problem solving techniques that so far, has put us ahead of the standard
desktop computer.
Computers can grow in physical size, and components can get smaller and more efficient. New technologies seem almost endless (because of the human brain) . Will we be ever be able to stuff enough in our heads to catch up? Or in the end will we become mindless dependants on electronic thinking devices?
What are our brains' limits? Think about it.