Our goal with MacBook was to do the impossible: engineer a full-size experience into the thinnest, lightest Mac notebook yet. And not only is it compact - it's more powerful than ever. The new MacBook delivers up to 20 percent faster performance with new seventh-generation Intel Core m3, i5, and i7 processors,1 and up to 50 percent faster SSD storage. Each component inside MacBook has been meticulously designed to get the most out of an incredibly thin and light enclosure. We chose powerful yet highly efficient processors, and optimized macOS to draw on the processor using as little power as possible. Because no fan is needed to cool the computer, it has more room for battery cells to support you on the go, all day long. MacBook was built for virtually silent performance. Its processor runs on just 5 watts of power, which generates less heat and eliminates the need for a fan to cool the computer. Instead, the logic board is seated on an anisotropic graphite sheet that helps disperse any heat. So you won't hear a thing while your MacBook is hard at work. To achieve all-day battery life,3 we needed to use every millimeter of space inside MacBook. So we created an innovative terraced battery cell, custom shaped to fit the specific contours of the enclosure. The result is 35 percent more battery cell capacity than would have been possible before. The stunning 12-inch Retina display on MacBook is truly something to behold. With over 3 million pixels and edge-to-edge glass, every image leaps off the screen in rich, vibrant detail. All on an amazingly thin Retina display.