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
MediaTek, the fabless Semiconductor innovator has accelerated its development cycle relative to feature phones to remain competitive with global competitors Qualcomm, Broadcom and Marvell and stay ahead of emerging Chinese competitors RDA and Spreadtrum. They are launching chipsets through 2013 and 2014 for entry, mainstream, premium and tablet segments for emerging markets to offer a broad product line spanning sub-US$50 smartphones to more advanced US$200-300 tier-one like smartphones.