MediaTek today launched the Dimensity 9400, the company's new flagship smartphone chipset optimized for edge-AI applications, immersive gaming, incredible photography, and more. The Dimensity 9400, the fourth and latest in MediaTek's flagship mobile SoC lineup, offers a massive boost in performance with its second-generation All Big Core design built on Arm's v9.2 CPU architecture, combined with the most advanced GPU and NPU for extreme performance in a super power-efficient design.

The Dimensity 9400 adopts MediaTek's second-gen All Big Core design, integrating one Arm Cortex-X925 core operating over 3.62 GHz, combined with 3x Cortex-X4 and 4x Cortex-A720 cores. This design offers 35% faster single-core performance and 28% faster multi-core performance compared to MediaTek's previous generation flagship chipset, the Dimensity 9300. Built on TSMC's second-generation 3 nm process, the Dimensity 9400 is up to 40% more power-efficient than its predecessor, allowing users to enjoy longer battery life.

Arm has announced a pair of new Armv9 CPU cores today, alongside a refresh of a third. The new additions are the Cortex-X925—which is a huge model number jump from the previous Cortex-X4—and the Cortex-A725 which should be an upgraded Cortex-A720. Finally the Cortex-A520 has been refreshed to bring a 15 percent power efficiency improvement as well as support for 3 nm production nodes. Arm claims that the Cortex-A925 delivers its highest performance improvement ever over a previous generation with a single core uplift of up to 36 percent and an AI performance improvement of up to 46 percent compared to the Cortex-X4. The Cortex-X925 will support up to 3 MB private L2 cache and is tape-out ready for 3 nm production nodes.

The Cortex-A725 is said to offer a 35 percent performance efficiency improvement over the Cortex-A720 and it's been given performance boosts both when it comes to AI and gaming workloads. It's said to be up to 25 percent more power efficient than the Cortex-A720 and L3 cache traffic has been improved by up to 20 percent. Again, the Cortex-A720 is ready for production on a 3 nm node. Finally, Arm has also updated its DynamIQ Shared Unit to the DS-120 and here Arm has managed to reduce the typical workload power by up to 50 percent and the cache miss power by up to 60 percent. The DSU-120 scales to up to 14 Arm cores, suggesting that we might get to see some interesting new SoC implementations in the coming years from Arm's partners, although Arm's reference platform is a 2-4-2 configuration of the new cores.