title: Why can GPU do matrix multiplication faster than CPU?
body: <p>I've been using GPU for a while without questioning it but now I'm curious. </p>
  
  <p>Why can GPU do matrix multiplication much faster than CPU? Is it because of parallel processing? But I didn't write any parallel processing code. Does it do it automatically by itself? </p>
  
  <p>Any intuition / high-level explanation will be appreciated!</p>