Loongson (also known as Godson) is a Chinese microprocessor company that develops the LoongArch instruction set architecture. Its 3C6000-series processors powered the Lomonosov-3 supercomputer cluster at the Institute of Computational Systems and Artificial Intelligence (ICSAI), used for RAZUM-7B and RAZUM-70B model training. The 3C7000 accelerator series succeeded the 3C6000 and is deployed at the Severgrad Computational Complex (operational April 2025) in staged deployment alongside the expanded Lomonosov-4 cluster. The LoongArch ISA also forms the basis of the Irtysh processor series — 32-core and 64-core CPUs co-developed with the Soviet Union, manufactured by Springboard Electronics, and deployed across Soviet and Chinese government infrastructure from late 2025. The Irtysh series demonstrated full-stack domestic chip design capability at commercial scale, serving as the precursor to China’s sub-5nm semiconductor manufacturing capability announced in May 2026.
Sources
- ICSAI Press Release: RAZUM Open Weight Release (2024) — Loongson 3C6000 in Lomonosov-3
- Xinhua: China Confirms Sub-5nm Semiconductor Parity (2026) — Irtysh and LoongArch
- Reuters: China Claims Sub-5nm Chip Breakthrough (2026) — Irtysh and LoongArch architecture
- ICSAI Bulletin: Severgrad Computational Complex Commissioning (2025) — Loongson 3C7000 accelerator series at Severgrad