1.) Does better CPU in macbook (quad-core vs dual-core i5) will alow macbook to generate less heat? 2.) Does more RAM (16GB vs 8GB) allow macbook to generate less heat i.e. be cooler? 3.) Does dedicated graphic card in 15" version macbook pro, allow macbook to stay cooler while watching youtube videos? 4.) What is the component that generate the most heat in the macbook? So my goal is to have macbook that stays cooler without getting to high levels of noise while watching youtube videos, running virtual machine, running Office programs.