Amazon.com: IVANKY Active DisplayPort to HDMI Adapter, 4K@60Hz Unidirectional DP to HDMI Adapter, [Updated New Model], Display Port to HDMI Compatible for HP, ThinkPad, AMD, NVIDIA, Desktop and More - Grey :
Mini DisplayPort to HDMI 2.0 Active Cable (M/M) 4K @ 60Hz – VisionTek.com
Amazon.com: StarTech.com DisplayPort to HDMI Adapter - 4K 60Hz Active DP 1.4 to HDMI 2.0 Video Converter - DP to HDMI Monitor/TV/Display Cable Adapter Dongle - Latching DP Connector (DP2HD4K60S), Black : Electronics