Cable Matters 4K DisplayPort to DisplayPort Cable 1m (DP to DP Cable) with 4K (3840 x 2160@60Hz), 2K (2560 x 1440@144Hz) support - 1 Metres: Amazon.co.uk: Computers & Accessories
StarTech.com 3ft (1m) HDMI to Mini DisplayPort Cable 4K 30Hz, Active HDMI to mDP Adapter Converter Cable with Audio, USB Powered, Mac & Windows, HDMI Male to mDP Male Video Adapter Cable -