The 1st sovereign high-performance energy-efficient processor
Initiated inside the European Processor Initiative (EPI) consortium to equip European supercomputers with sovereign hardware, the Rhea1 processor was designed by SiPearl’s R&D teams to deliver computing power and energy efficiency for high-performance computing (HPC) and AI inference workloads.
Currently being manufactured at TSMC, the world’s leading advanced semiconductor factory, Rhea1 will be available for sampling in early 2026.
It will equip JUPITER, the first European exascale (1 billion billion calculations per second) supercomputer.
In a complex geopolitical context, Rhea1 will contribute to Europe’s technological sovereignty for strategic applications in security, defence, medical research, energy, climate and engineering with a reduced carbon footprint.
High Performance
To surpass the performance of 10,000,000 laptops.
Energy-efficiency
Significant energy savings thanks to Arm-based architecture.
Flexibility
Designed to work with any third-party accelerator (GPU, AI, quatum).
Backdoor-free
& kill switch-free
To protect data with secure end-to-end network transmission.
Software ecosystem
Arm mature software ecosystem.
Sovereignty
To strengthen Europe’s technological leadership and independence.
Technical features
Discover all the details about Rhea1
The processor dedicated to supercomputing and AI inference
To meet all the requirements for HPC and AI inference workloads, Rhea1 integrates 80 arm® Neoverse V1 cores with 2 Scalable Vector Extension (SVE) units of 256 bits per core, built-in High Bandwidth Memory with 4 stacks of HBM, 4 DDR5 interfaces supporting 2 DIMMs Per Channel (2DPC) and 104 lanes of PCIe Gen5 interface.
Rhea1 is supported by a wide range of compilers, library and tools.
Thanks to both the generous memory capacity and high bandwidth of in-package HBM, it will deliver extraordinary performance and energy-efficiency with an unrivalled byte-per-flop ratio.
Our markets
At the heart of supercomputers and servers, Rhea1 processors and subsequent generations will enable us to meet the strategic scientific, industrial and societal challenges of our time.
Our microprocessors will thus contribute to improving the daily lives of all citizens.
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