MST transmits two halves of an image (right and left), each 2x2K at 30 or 60 Hz. This operating system looks at the halves of the image like separate screens as long as they are not connected to a screen by a driver or accessory software. This method is obsolete in modern 4K monitors because it can process the 4K image in full via display port 1.2. This method of transmission is called SST. In this case, the full image, i.e. the full 4K resolution, is transmitted to the monitor and displayed at 60 Hz.