The use of processors that have datapath widths, integer size, and memory addresses widths of 64 bits (eight octets). In 2003 64-bit CPUs were introduced to the (previously 32-bit) mainstream personal computer arena in the form of the x86-64 and 64-bit PowerPC processor architectures and in 2012 even into the ARM architecture targeting smartphones and tablet computers, first sold on September 20, 2013 in the iPhone 5S powered by the ARMv8-A Apple A7 SoC.

The quantity of processor cores which can be used in the device.