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Lightelligence: Photowave: Optical CXL Interconnect for Composable Data Center Architectures

The demonstration showcases the benefits of CXL over optics connectivity for large language model (LLM) inference. The AI model is stored in two Micron CXL memory expansion modules which are optically connected by a pair of Photowave PCIe cards to an AMD Genoa CXL 1.1 server and NVIDIA A10 GPU. MemVerge’s memory machine software is utilized to enhance memory performance. A 2.4x improvement in decode throughput is demonstrated using optical CXL memory expansion compared to local SSD memory.