I just installed 8 more GB of memory from OWC (for total of 12) and I went to Activity Monitor to see how must I was using. Well, the memory usage was fine, but I don't understand the %CPU numbers? I happened to be using handbrake at the time and handbrake was showing 356% CPU? How is this possible? Obviously the %CPU isn't based on 100%. Can someone explain this to a relatively new iMac user?