Arm Goes for Rebrand for Mobile CSS, Drops Cortex, Immortalis

Sept. 15, 2025 – 

For 2025, Arm has created an official brand for its mobile CSS, and is moving away from its historic Cortex brand for its CPUs. 

By Jim McGregor, EETimes (09.10.2025)

This week’s launch of Arm’s Lumex, the new Compute Subsystem (CSS) for mobile devices brings a series of new brands from the company as it adds new CPUs, GPUs, system intellectual property (IP), and new Scalable Matrix Extensions version 2 (SME2) with accompanying hardware acceleration. In addition to achieving double-digit performance gains for the sixth generation, the Lumex platform is focused on AI performance as close to the CPU and data as possible. 

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