NVIDIA announced NVIDIA® NVLink®-C2C, an ultra-fast chip-to-chip and die-to-die interconnect that will allow custom dies to coherently interconnect to the company's GPUs, CPUs, DPUs, NICs and SOCs. With advanced packaging, NVIDIA NVLink-C2C interconnect would deliver up to 25x more energy efficiency and be 90x more area-efficient than PCIe Gen 5 on NVIDIA chips and enable coherent interconnect bandwidth of 900 gigabytes per second or higher. NVIDIA NVLink-C2C is the same technology that is used to connect the processor silicon in the NVIDIA Grace™ Superchip family, also announced March 22, 2022, as well as the Grace Hopper Superchip announced last year.

NVLink-C2C is now open for semi-custom silicon-level integration with NVIDIA technology. NVIDIA NVLink-C2C supports the Arm® AMBA® Coherent Hub Interface (AMBA CHI) protocol. NVIDIA and Arm are working closely together to enhance AMBA CHI to support fully coherent and secure accelerators with other interconnected processors.

NVIDIA NVLink-C2C is built on top of NVIDIA's world-class SERDES and LINK design technology, and it is extensible from PCB-level integrations and multichip modules to silicon interposer and wafer-level connections, delivering extremely high bandwidth while optimizing for energy and die area efficiency. In addition to NVLink-C2C, NVIDIA will also support the developing Universal Chiplet Interconnect Express (UCIe) standard announced earlier this month. Custom silicon integration with NVIDIA chips can either use the UCIe standard or NVLink-C2C, which is optimized for lower latency, higher bandwidth and greater power efficiency.

Some of NVLink-C2C's key features include: High Bandwidth – supporting high-bandwidth coherent data transfers between processors and accelerators; Low Latency – supporting atomics between processors and accelerators to perform fast synchronization and high-frequency updates to shared data; Low Power and High Density – using advanced packaging, it is 25x more energy efficient and 90x more area-efficient than PCIe Gen 5 on NVIDIA chips; Industry-Standard Support – works with Arm's AMBA CHI or CXL industry-standard protocols for interoperability between devices.