23e2d45c_isualizer_User_Guide___GeForce__Animation_Style
[Description] First all the GPU LEDs go from minimum to maximum brightness, after which the SLI Bridge LED brightness goes from minimum to maximum. This gives the impression of light flowing from in (GPU) to out (SLI). [SLI LED Required] X [“All LEDs” Required] X [Animation Style] 
Flow Out
GeForce Experience GeForce GTX LED Visualizer User Guide | GeForce
Animation Style