Arm X3 CPU gets a 25% speed boost, should still be slower than a 2021 iPhone

Enlarge / The Arm Cortex X3 brings some modest improvements. (credit: Arms)

Fresh off a dramatic journey of not being bought by Nvidia, Arm announced its latest flagship CPUs. Coming soon to your 2023 Android devices, we have the Cortex-X3 and Arm Cortex-A715 CPUs.

As usual, these designs will be part of a system-on-chip CPU cluster. Assuming the normal layout, Arm’s proposed design would have a 2023 SoC with one big Cortex-X3 core, three medium-core Cortex-A715 CPUs, and four little Cortex-A510 cores, which are returning from the current generation.

Arm is promising the X3 CPU will 25 percent performance improvement over the X2, while the Cortex A715 is claiming a “20 percent energy efficiency gain and 5 percent performance uplift” compared to the current-gen Cortex A710. Arm claims the A715 is as fast as the Cortex X1 CPU from 2020. The A715 also drops 32-bit support, making it the last part of our theoretical flagship SoC to go 64-bit only. The smaller A510 CPU is returning, but Arm says it is “an updated version” with a 5 percent power reduction.

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