Hello.I have G4620 cpu and MB with HDMI out limited to 1.4.Is it possible to get a 60 Hz 4K signal over a limited HDMI 1.4 interface to my LG UHD TV?Can I set in Intel Graphic Command Center to use a YCbCr 4:2:0 sample like NVIDIA did this trick HERE?Tnx in advance
Well, it *is* listed as a working possibility in https://en.wikipedia.org/wiki/HDMI, provided that you use YCbCr 4:2:0. Whether IGCC will actually let you set this configuration is a different animal. All I can say is try it and see (and let us know if it works!).
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Thanks for the reference article, it is very interesting indeed. I did more digging on the topic and while it seems possible there were (at the time) some caveats including the display's own support for this mode as noted here. Obviously I can't and won't comment on 3rd party tech.
I can confirm we don't have a control in the Intel graphics driver interface to manually switch to YCbCr 4:2:0 subsampling, however this is one setting we are working to incorporate in a future Intel Graphics Command Center update. Even so, I won't be able to promise you will be able to achieve 4K @ 60hz over HDMI 1.4 as the implementation of the manual control of Color Depth, Color Space and subsampling is still a work in progress and may not be equal as the one indicated in the article you mentioned, and still be limited by other aspects such as the graphics controller capabilities, just to name one.
For now know that with Intel integrated graphics you are limited to 4K @ 30hz if the output is HDMI 1.4 standard.
Edit: I'm sorry if this wasn't the answer you were looking for, I know it is a bummer!