How to differentiate iPhone/iPad 32-bit, 64-bit, and PCIE HDD?


Junior Member
May 21, 2013
The “Bit” of CPU is the amount of information that can be processed at one time. 1 Byte equals 8 bits. A 32-bit processor can process 4 Bytes of information each time; while a 64-bit processor can process 8 Bytes of information each time, twice as fast as a 32-bit processor.
PCIe (Peripheral Component Interconnect Express) is a high-speed serial computer expansion bus standard that’s maintained and developed by the PCI-SIG. PCI Express protocol can be used as data interface to flash memory devices, such as memory cards and solid-state drives (SSDs). Many high-performance, enterprise-class SSDs utilize PCIe to allow much higher transfer rates and IOPs.

32-bit HDD models:
iPhone 4
iPhone 4S
iPhone 5
iPhone 5c
iPad 2
iPad 3
iPad 4
iPad Mini1

64-bit HDD models:
iPhone 5s
iPhone 6
iPhone 6P
iPad Air/iPad 5
iPad Air2/iPad 6
iPad Mini2
iPad Mini3
iPad Mini4

PCIE HDD models:
iPhone SE
iPhone 6S
iPhone 6S Plus
iPhone 7
iPhone 7Plus
iPad Pro 9.7
iPad Pro 10.5
iPad Pro 12.9
iPad Pro New
iPad 2018_A1893_MR7K2
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