CPU And GPU
Apple's 64-bit A7 system-on-chip is a smartphone industry first. The A7 contains two 64-bit application cores with matching pairs of general-purpose registers and floating point registers. Built on a 102mm die, it contains more than a billion transistors and a modern instruction set. A7 also can run 32-bit apps, says Apple, and requires no changes to existing iOS apps (more on iOS and its apps later). According to the company, A7 delivers a 40x CPU performance improvement and up to 56x graphics improvement over the original iPhone and about twice that of iPhone 5.. Also built into iPhone 5S is the M7, a dedicated motion processor that continually measures data coming from the accelerometer, gyro and compass to enable a "new generation of health and fitness apps." It's accessed using Apple's new CoreMotion API. Galaxy S4's <a data-cke-saved-href="http://www.qualcomm.com/media/documents/qualcomm-snapdragon-600-product-... href="http://www.qualcomm.com/media/documents/qualcomm-snapdragon-600-product-... target="_blank>Qualcomm Snapdragon 600 contains four 32-bit ARMv7 cores running at 1.9 GHz (Apple didn't release A7's clock rate). For graphics, Snapdragon has an Adreno 320 optimized for HTML5 and 3-D software. Galaxy adds probes for temperature, humidity and barometric pressure that can be used by health apps.