Brain Matters Our brains contain roughly 86 billion brain cells • In general, men’s brains are 10% bigger than women’s. However, the hippocampus, the part of the brain most strongly linked with memory, is typically larger in women • Your brain’s storage capacity is considered virtually unlimited. It doesn’t get “used up” like RAM in your computer. The latest research shows that the brain’s memory capacity is a petabyte, or a quadrillion bytes … about the same amount needed to store the entire internet.