Powering both the new iPhone 6 and iPhone 6 Plus is Apple's new A8 SoC. This new chip, which contains around two billion transistors, will be one of the first mass-market components to use TSMC's 20nm process. The A8 SoC will, according to Apple, be about 25% faster than its predecessor in CPU tasks, and 50% faster on the GPU side of things. These are some big performance gains that are made even more impressive by the fact that the A8 is reportedly 50% more power efficient than the A7 -- and, despite almost doubling the transistor count, the die size is somehow 13% smaller. Read on for some detailed analysis of Apple's new A8 SoC.