But the real change, likely in 2014 according to Linley, will be a shift to 64-bit chip architectures for mobile processors. Linley believes Apple is already at work on this, likely implementing the 64-bit ARMv8 instruction set.
"A 64-bit processor can more easily handle 4GB of DRAM and higher," Linley says. "The iPhone 5 uses 1GB of DRAM [itself doubling the DRAM of iPhone 4S], and some competing phones use 2GB, so it is easy to imagine an iPhone in 2014 with 4GB of DRAM. Also, ARM has included many other innovations in its 64-bit ARMv8 design, so it's kind of a package deal. If Apple wants to keep pace with the leading ARM processors, it has to go to 64 bits in 2014."
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