Adapter HDMI to DisplayPort - 4K 30Hz - HDMI® and DVI Video Adapters | Colombia (en)
LG27GL850 + r9 380 only 4k/30hz : Monitors
2 Port Hdmi Kvm Switch Dual Monitor 4K@30Hz with 2 USB 2.0 Hub Support Hdcp Wireless Keyboard & Mouse and Hotkey Switch buy on ZoodMall. 2 Port Hdmi Kvm Switch Dual Monitor
USB C to HDMI Adapter (4K@30Hz) Type-C to HDMI Adapter | uni
Vizio M-series 2016 as PC monitor Can't get 4K @ 60Hz v-sync always locks refresh rate to 30Hz @ 4K. - Displays - Linus Tech Tips