YCbCr444 vs RGB output color format confusion

[brontosaurus]

I've been looking to upsize my main display from a Dell U3415W to a 4K monitor. I also wanted a larger monitor, but didn't want to spend a fortune, so I started looking at 4K TVs. That's when I started to learn more about the output color format, and people were adamant about 4:4:4 @ 60 hz on TV if used as computer monitors. That said, I purchased the Wasabi Mango UHD430, which is a 10bit panel with 4:4:4 @ 60 hz.

So I did a quick check on my display settings in Nvidia Control Panel. I have a Dell U2715H and the UHD430. When I check U2715H's output color format I have a few options, but most importantly I have YCbCr444 and RGB. I've had it set at RGB, which allows the Output Dynamic Range to be Full or Limited. But when I select YCbCr444, the Output Dyanmic Range is grayed out and changed to Limited.

Same happens with the UHD430, except it specifies the output color depth as 10bit.

What is the different between YCbCr444 and RGB, and why is the dynamic range grayed out and set to limited for YCbCr444? Am I losing anything relative to RGB (Full dynamic range) if I set my monitors to YCbCr444 (Limited dynamic range)? Currently it's set at RGB. See below for screenshots.

Screenshots

 

[us3rnotfound]

Does the TV have an HDMI/DVI range option for Standard (16-235) or NonStandard (0-255)? The former being 4:4:4, the latter RGB. Just make sure the PC and TV agree on the color format so you don't get "crushed blacks".

Just hoped to add to the answers that will be provided here.

 

[brontosaurus]

@us3rnotfound

I may have left out a critical piece of information when you mentioned HDMI/DVI. Both these monitors are connected via Displayport. Does your question still apply for a DP connection? If so, is Standard the maximum range option for 4:4:4 and does that mean RGB is a better option for best image?