SLI, or Scalable Link Interface, is a technology developed by NVIDIA that allows multiple graphics processing units (GPUs) to work together in a single computer system. This setup enhances the overall graphics performance, making it particularly beneficial for gaming and graphic-intensive applications. By distributing the workload across multiple GPUs, SLI can significantly improve frame rates and visual quality. To use SLI, a compatible motherboard and multiple NVIDIA GPUs are required. The GPUs communicate with each other to share the rendering tasks, which can lead to smoother gameplay and better performance in demanding scenarios. However, not all games support SLI, and the performance gains can vary depending on the specific application.