Siemens’ role is to give Arm a pre-silicon validation environment for the Arm AGI CPU, not to manufacture the processor itself. Siemens says Arm used its Veloce Strato CS hardware-assisted verification platform to support verification from subsystem through full-system level, while Veloce proFPGA CS is being used for FPGA-based pre-silicon software development ^[5]. Arm frames the AGI CPU as its first Arm-designed data-center CPU for agentic AI infrastructure and part of its expansion from IP and Compute Subsystems into production silicon products ^[1].

What Siemens is contributing

At a practical level, Siemens is helping Arm in three linked ways:

• Hardware-assisted emulation: Veloce Strato CS was used to verify the Arm AGI CPU from subsystem through full-system level, with attention to performance, latency and power requirements ^[5].
• Full-system verification at scale: Arm’s Karima Dridi described the work as full-system verification of the Arm AGI CPU at scale using multiple towers of Veloce Strato CS ^[5].
• FPGA prototyping for software readiness: Veloce proFPGA CS supports pre-silicon software development, including validation, driver development and system bring-up before silicon availability ^[5].

Together, those steps let Arm exercise more of the chip and its surrounding system behavior before tapeout, when design changes are still more manageable.

Why the AGI CPU needs this kind of validation

The Arm AGI CPU is aimed at agentic AI and cloud data-center deployments, and Siemens says it is built on the Arm Neoverse Compute Subsystem V3 platform ^[5]. Arm’s launch materials describe it as the company’s first Arm-designed data-center CPU and claim more than 2x performance per rack compared with x86 platforms ^[1].

That kind of product target raises the validation bar. Siemens points to a design that includes a complex multi-die CSS architecture, Neoverse V-series cores, high-speed interconnects and interfaces such as PCIe Gen6, NVMe and CXL ^[5]. Verifying only isolated blocks would not be enough; Arm needs to understand how the broader system behaves under data-center-style conditions before physical silicon exists.

How Veloce Strato CS helps before tapeout

Veloce Strato CS is the emulation layer in the flow. Siemens says it supported Arm AGI CPU verification from subsystem to full-system level and helped address performance, latency and power requirements ^[5]. Siemens also says Arm used its hardware-assisted verification, emulation and prototyping workflows to validate key performance metrics for the Neoverse V-series Compute Subsystem used in the AGI CPU ^[5].

The key value is scale. By running large portions of the design in a hardware-assisted environment, Arm can test interactions that are difficult to cover thoroughly with block-level verification alone. That matters for a cloud CPU where cores, interconnects, I/O and system software all have to work together reliably.

How Veloce proFPGA CS helps software teams start earlier

The FPGA prototype addresses a different problem: software cannot wait until the first chips arrive. Siemens says Veloce proFPGA CS is being used for pre-silicon software development, allowing FPGA-based prototypes to run at near-real-time speeds so teams can begin validation, driver development and system bring-up before silicon availability ^[5].

That is especially important for a data-center CPU, where platform readiness depends not just on the hardware design but also on firmware, drivers and system-level software being ready when the chip becomes available.

What this proves — and what it does not

The Siemens collaboration shows that Arm is using industrial-scale, hardware-assisted verification and prototyping to reduce risk before tapeout ^[5]. It does not, by itself, independently prove final production-silicon performance. Arm’s public performance claims, including the more-than-2x performance-per-rack comparison with x86 platforms, remain Arm’s stated claims in its launch materials ^[1].

Bottom line

Siemens is helping Arm move AGI CPU validation earlier in the design cycle. Veloce Strato CS gives Arm a way to emulate and verify the processor from subsystem to full-system scale, while Veloce proFPGA CS gives software teams a pre-silicon platform for validation and bring-up ^[5]. The result is a validation flow aimed at finding performance, power, latency, integration and software-readiness issues before the AGI CPU is committed to production.