SIIG Triple 4K DisplayPort 1.4 to 2x DP & 1x HDMI MST Hub Multi Monitor Adapter | eBay
Amazon.com: StarTech.com 4K HDMI Splitter 1 In 2 Out - 4K 30Hz HDMI 1.4 2 Port Video Splitter Box -with high speed HDMI cable, USB power cable - Black (ST122HD4KU) : Electronics