More than two years after the release of cortex-a77 architecture for 7Nm process, arm company officially launched a new generation of CPU architecture tonight——Cortex-a78, suitable for 5nm process, can improve performance by 20% and reduce power consumption by 50%.Cortex-a78 is the Hercules processor exposed in the past two years. This is the third generation product of Austin microarchitecture CPU. It has developed into cortex-a76, cortex-a77 and now cortex-a78.
Cortex-a78 architecture does not blindly pursue performance improvement, because arm also launched a new cortex-x1 architecture (to be introduced later), which tends to improve performance, while cortex-a78 pays more attention to performance, power consumption and area, that is, PPA balance.
According to arm,The architecture performance (i.e. IPC) of cortex-a78 is only improved by 7%, the power consumption is reduced by 4%, the core is reduced by 5%, and the area of four core cluster is reduced by 15%.
Although there is little change in the micro architecture, if it is combined with the process, the cortex-a78 will change greatly under the 5nm support.
According to arm, under the same power consumption of 1W per core, the cortex-a77 produced at 7Nm can reach 2.6GHz, while the cortex-a78 produced at 5nm can reach 3.0GHz, with a continuous performance improvement of about 20% under the same power consumption.
Of course, Xiaobian has to point out that ARM each time a new generation of CPU is released, this comparison under the same power consumption, same-sex energy is actually very confusing, this is to unify the calculation, the actual performance improvement is not in line with the algorithm here, A77 the core frequency can also be close to 3 under 7 nm, so Cortex-A78 performance improvement should not be much expected.
Cortex-a78 is mainly used for smart phones and other products in 2021. However, considering the previous situation, it is difficult to popularize cortex-a78 in 2021. Arm did not mention which companies have applied this architecture now.