ARM presents Cortex A75 and A55 processor cores

The British ARM has proposed the Cortex A75 and A55 processor cores. They must follow the Cortex A73 and A53. In addition, the chip designer comes with the Mali G72 GPU, which is the successor to the existing G71.

Like their predecessors, the A75 and A55 are based on the 64-bit ARMv8 architecture. This concerns ARMv8.2, where previous processor cores were on the ARMv8.0 architecture. The difference is support for DynamIQ, the successor to big.Little. This means that clusters can consist of different processor cores, while big.Little always has cores of the same generation.

The A55 is the second generation of ARM’s frugal 64-bit processor core; the A53 has been in operation for three years. At that time, ARM already gave the A57 core successors in the form of A72 and A73, but the A53 remained unchanged.

ARM emphasizes increased economy. Using the same process and with the same clock speed, the A55 is 15 percent more efficient than the A53, claims ARM. The A55 cores have a built-in l2 cache, which the A53 has yet to share. There are options up to 256kbit, for mobile devices, according to ARM, it will often be 128kbit.

For Cortex A75, the processor designer has mainly focused on performance. The profit should be about 20 percent compared to the A73. Much of the structure of the processor core has remained the same.

The G72 GPU increases the performance per square millimeter compared to the G71 by 20 percent, while the economy must have improved by 25 percent at the same clock speed. The new GPU has 32 shader cores.

Licensees received all the information about A75 and A55 at the end of last year, and ARM expects the first smartphones with processors based on this generation to appear early next year, although some manufacturers such as Huawei may be slightly faster.