Nvidia GTX seires for 10-bit color output for OpenGL

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Hello,

I've used my GTX1080 for 3monthes, but suddenly wonder if my card can give me 10-bit color experience on win-UI environment.

Searched lot of forum about color bit output, 'NVIDIA Geforce graphics cards have offered 10-bit per color out to a full screen Direct X surface since the Geforce 200 series GPUs. Due to the way most applications use traditional Windows API functions to create the application UI and viewport display, this method is not used for professional applications such as Adobe Premiere Pro and Adobe Photoshop. These programs use OpenGL 10-bit per color buffers which require an NVIDIA Quadro GPU with DisplayPort connector.' -from Daniel Hill (http://www.liftgammagain.com/forum/index.php?threads/does-pascal-gpu-support-10bit-per-color-gtx.6855/)
found those kinds of answer.

But if 10bit color drawing is possilb at DirectX11, then why not for OpenGL? I thinks those are all processed on the
S/W aspect, not H/W. because we all know it, architecture itself supports 10, 12 bit color spectrum.

Is there anyone who knows well about this area? Need some help :3