Arm's Armv9 Is the Biggest Architecture Shift in a Decade
Arm unveiled its Armv9 CPU lineup — Cortex-X2, A710, and A510 — pointing at 2022's flagship phone chips.
Arm dropped its next architecture yesterday, and it’s worth pausing on, because Arm doesn’t do this often. Armv9 is the successor to Armv8, which has been the foundation under basically every flagship phone chip since 2011. That’s a full decade of iteration on one base design. Armv9 is the reset.
The new lineup has three cores: Cortex-X2, Cortex-A710, and Cortex-A510. If you’ve followed phone chipsets at all, you’ll recognize the pattern — these are the direct successors to the Cortex-X1, Cortex-A78, and Cortex-A55 that make up the big.MID.little arrangement in this year’s flagship SoCs (think the silicon inside your current-gen Snapdragon or Exynos phone). X2 is the peak-performance core, A710 is the efficient-but-still-fast workhorse, and A510 handles the low-power background tasks. Same philosophy as before, new engineering underneath.
What’s actually new
Arm is leaning hard on two themes with this generation: security and machine learning. On security, Armv9 brings in the Confidential Compute Architecture, which is meant to let devices carve out isolated, hardware-protected memory regions — useful for anything from DRM to on-device financial data to, eventually, more robust enterprise device management. This is Arm’s answer to a world where phones (and increasingly laptops) hold more sensitive data than most people’s actual wallets.
On the ML side, expect meaningfully better performance for on-device inference — the stuff powering computational photography, voice processing, and predictive text — without leaning as hard on a dedicated NPU. That matters because not every chip vendor implements a beefy neural engine, but everyone licensing Arm cores gets these gains more or less for free.
None of this ships this year. Armv9 cores are landing in flagship smartphone SoCs shipping in 2022, so whatever phone you’re eyeing for a fall 2021 launch is still running last-generation silicon under this new architecture’s shadow. That’s normal — there’s always a lag between Arm’s core announcements and silicon partners like Qualcomm, Samsung, and MediaTek taping out actual chips, then OEMs shipping phones built around them.
Still, it’s a useful marker for where the industry is heading. The framing this time isn’t “faster clock speeds,” it’s “more secure, more ML-capable.” That tracks with where phones have actually been getting more interesting lately — not raw CPU benchmarks, which plateaued for most users years ago, but background intelligence: better night photos, smarter battery management, on-device transcription that doesn’t need the cloud.
If you’re the type who upgrades on a two-year cycle, this is basically confirmation of what your 2022 phone’s CPU story will look like. If you’re more of an infrastructure nerd, the Confidential Compute Architecture piece is the one to watch — it could end up mattering well beyond phones, especially anywhere Arm chips are creeping into servers and laptops.