noticed able to see 10 bit color on develop mode using GTX570, DVI and 10bit monitor

Hi

I noticed I am able to see 10 bit color on develop mode when I use GTX 570, DVI connection and 10 bit Monitor (NEC PA272W).

I think because lightroom uses directx instead of OpenGL. Interesting thing is I don't need display port to see 10 bit color.

I just download ramp.psd and check on library and develop mode. on Library I can see banding. But on develop mode, I don't see any banding !!

Anyone tried it ?

Thanks