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Scalable Link Interface (SLI) is a technology developed by NVIDIA for linking multiple graphics processing units (GPUs) together to work in parallel and increase graphical processing power. SLI allows two or more NVIDIA GPUs to be connected within a computer system, working cooperatively to render graphics and improve overall performance in graphics-intensive applications and games.

How SLI Works:

In an SLI configuration, the GPUs communicate with each other through a bridge connector installed on the graphics cards. This bridge enables data transfer between the GPUs, allowing them to distribute the rendering workload effectively. Each GPU renders alternate frames or splits the rendering tasks to improve frame rates and deliver a smoother gaming experience.

Key Features and Advantages:

  1. Increased Graphics Performance: SLI enables significant improvements in graphical performance by harnessing the combined power of multiple GPUs. This results in higher frame rates, smoother animations, and better overall graphics quality in supported applications.
  2. Flexible Configuration Options: SLI can be configured with various GPU models, although it is recommended to use identical GPUs for the best compatibility and performance. SLI can also be used with different generations of NVIDIA GPUs, known as “mixed-SLI,” allowing users to upgrade their GPUs without losing SLI support.
  3. Scalability: SLI is scalable, meaning users can add additional GPUs to their system to further boost performance, depending on the application’s demands and the number of GPUs supported by the motherboard.
  4. 3D Performance Boost: In addition to improving standard 2D graphics, SLI also enhances 3D graphics rendering for video games and other 3D applications, allowing users to experience higher frame rates and more detailed visuals.

Requirements and Considerations:

  1. SLI-Compatible Motherboard: To use SLI, the motherboard must support NVIDIA SLI technology and have multiple PCIe x16 slots to accommodate the GPUs.
  2. Power Supply and Cooling: Multiple GPUs in an SLI configuration require sufficient power supply and effective cooling solutions to handle the increased power consumption and heat output.
  3. SLI Profiles: For SLI to work optimally, games and applications must have SLI profiles created by NVIDIA or developers to ensure proper utilization of multiple GPUs.
  4. Driver Updates: NVIDIA releases regular driver updates to improve SLI performance and add support for new games and applications.


Scalable Link Interface (SLI) is a powerful technology that allows users to maximize their graphics performance by combining multiple NVIDIA GPUs to work in parallel. With its increased graphical processing power, SLI is especially beneficial for gamers and professionals working with graphics-intensive applications. However, it requires compatible hardware, proper configuration, and ongoing driver support to ensure the best performance and compatibility.

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