Doesn't work with GeForce GTX 880M or GeForce GTX 1060M. Not sure if it was due to graphics cards or ViewSonic or Toshiba 1080p monitors, but on 880M it randomly disappeared and blocked 1060M with main screen freezing and no signal on connected monitors. Monoprice was very helpful in providing a replacement and subsequent refund which is why I give it such a good rating.