A high bandwith sli bridge is an essential component to any sli setup, the purpose of this device is to transfer data between gpu's without using a PCIe lane. This allows the GPU's to communicate directly and not go across the PCIe lane which can cause performance bottlenecks.
The sli bridge connects two nvidia graphics cards together and improves graphical performance by increasing frame rates for smoother gameplay and reduced screen tearing. It also increases parallel processing capabilities to enable more advanced technologies like Nvidia's G-Sync and VRWorks.
In addition to improving graphical quality, SLI Bridge Connectors can provide a competitive advantage for avid gamers who participate in esports or professional gaming. Higher frame rates enable gamers to react faster and gain an edge over their opponents.
However, if you’re going to use multiple GPUs for the best possible performance, it’s important to ensure that the graphics cards can exchange information smoothly. SLI Bridge Connectors can reduce latency by ensuring that all GPUs receive the same image at the same time, which can significantly improve performance. This is especially true for incredibly demanding games with high CPU utilization, such as The Witcher 3, where even a small amount of latency can result in stuttering and choppy gameplay.