In computer architecture, the term 64-bit refers to the number of bits that can be processed or transmitted in parallel. In the context of a chip, it refers to the width of the registers. A 64-bit register can store 264 different values or can directly access 264 bytes of addressable memory as compared to 232 in a 32-bit architecture. As such, the most obvious benefit of a 64 bit architecture is its ability to address more system memory (up to 192GB vs. <4GB in a 32-bit architecture) and hence increase system performance when more memory is present.
SmartPhone innovator Apple moved to 64 bit mobile computing as early as the iPhone 5s Days. Apple’s A7 chip is rooted in ARM’s