Samsung UN55HU6830
XFX R9 290X
Monster Cable 5ft 22gbps HDMI
Windows 7 64-bit

I can not get this adapter to work with UHD Color mode enabled. I can get 3840×2160@60hz 4:2:0 only with UHD Color mode turned off.

Set to 8bpc
Updated TV firmware
Tried all HDMI ports
Tried PC mode
Tried different GPU drivers (Currently Crimson 16.1)

When I turn UHD Color mode on, the desktop briefly shows in-between intermittent black screens and “no signal”/”mode not supported” messages, continuously.

I would like to try the firmware update for the adapter.