The Scalable Link Interface (SLI) is a technology developed by NVIDIA that allows multiple graphics processing units (GPUs) to work together in a single computer system. This enables enhanced graphics performance, particularly in demanding applications like video games and 3D rendering. By connecting two or more GPUs, SLI can improve frame rates and overall visual quality. SLI operates by distributing the rendering workload across the connected GPUs, which can lead to smoother gameplay and better performance in high-resolution settings. However, to utilize SLI, users need a compatible motherboard and sufficient power supply, as well as games that support this multi-GPU configuration.