Samsung 2015 SUHD TV custom resolutions?

4k@34Hz
4k@36Hz
4k@39Hz
4k@41Hz

Or similar fractional refresh rate, but with integer pixel clock.

I did not try all of them, but the TV does not seem to like any. "DVI" input port did not help.

I am trying to max out HDMI 1.4b (or 1.3) and DisplayPort 1.1.

 

I tried making BOTH MHz and refresh rates integer with no luck.

--- Post Merged, Sep 16, 2016 ---

Partial success.

The maximum I could do for both HDMI 1.4b and DisplayPort 1.1 was 4k@31Hz.

Just by reducing the front porch from 30Hz.

 

The TV does not seem to like any of the 3 kinds of CVT timing.