Kunpeng 920: The First 7-nm Chiplet-Based 64-Core ARM SoC for Cloud Services

Kunpeng 920 is the second generation server processor designed by HiSilicon based on ARM architecture. Kunpeng 920 is able to achieve cost efficiency for various workloads through using a variety of chiplets and hybrid process technologies. The unique recomposition(s) of these flexible chipsets allows new designs to be created. The Kunpeng series processors combine technology innovations from various levels to improve efficiency, eliminate bottlenecks, and deliver value and performance. Its key features are as follows: The Kunpeng 920 core is specifically designed with superscalar architecture with the support of vector extension to provide leading features for high-performance computing applications; the coherent cache subsystem is created to integrate multicores into single chiplet (e.g., 7-nm process node) with a ring design that is ultralow-latency (<15 ns), nonblocking and bufferless; a dedicated parallel small-IO block is developed to achieve high-bandwidth (e.g., 400 GB/s) interdie connection for 2-D package solutions; IO die is redesigned (e.g., 16-nm process) so that the latest standard interface (e.g., PCI4.0) can be leveraged to scale up the System on a Chip (SoCs) and connect them with other IO devices; two or four Kunpeng 920 can work together as single symmetric multiprocessor system with cache coherent nonuniform memory access fabric.