Review on 🔌 Active Displayport to HDMI Adapter 4K@60Hz, WAVLINK DP 1.2 to HDMI 2.0 Active Converter - High Definition UHD 4K@60Hz, 3D Resolutions up to 1920x1080@120Hz - Ideal for HDTV, Monitor, Projector by Jason Hood

I used this adapter to connect my TV to a PC via a 30ft HDMI cable, obviously with a DisplayPort connector on the PC. Adapters can be arbitrary when using very long HDMI cables, but this unit didn't disappoint, playing HD video and audio with no issues. It probably helps that the adapter doesn't have a short end-to-end cable (it's a single compact piece instead). Sure, I now have this long, solid piece coming out of the back of the PC, but it's in the back and not visible, so it's not a problem.