The image below displays a setup without a Mux Switch and the external display is also receiving all the data from the iGPU. You can already see that this creates a bottleneck problem if the dedicated graphics card is processing and transferring a lot of data to the iGPU to process and transmit to the internal display or the display by itself. Any processing done by the external display card is also passed through and processed by the iGPU. It basically is a multiplexer that allows you to directly connect the display to the dedicated graphics card instead of the internal GPU.Īll laptops have a default graphics processor, they are called internal GPU (iGPU), and any other graphics card installed in addition to that is called a dedicated or external graphics card (dGPU).īy default, the internal laptop display is directly connected to the iGPU as it improves the battery performance and the majority of the tasks can be handled well by the laptop’s iGPU. MUX switch is hardware installed on your laptop by the laptop manufacturer. Finally What Is A MUX Switch and Is Mux Switch Good?
