DisplayPort does not support HDMI Audio Return Channel (ARC ... to multiple monitors at the same time without an additional ...

For high-performance TVs and monitors, there are two main cable types that you need to know about: HDMI and DisplayPort.

DisplayPort 1.2: Supports up to 4K at 60Hz, some 1.2a ports may also support AMD's FreeSync DisplayPort 1.3: Supports up to 4K at 120Hz or 8K at 30Hz DisplayPort 1.4: Supports up to 8K at 60Hz and HDR ...