The A8 chip is a 64-bit system-on-a-chip designed by Apple for use in its devices. Introduced in 2014, it powers products like the iPhone 6 and iPhone 6 Plus. The A8 chip features improved performance and energy efficiency compared to its predecessor, the A7 chip, allowing for faster processing and better battery life. This chip includes a central processing unit (CPU) and a graphics processing unit (GPU), enabling smooth graphics and multitasking capabilities. The A8 chip also supports advanced features such as Metal, a graphics framework that enhances gaming and app performance on iOS devices.