LG finally answered to my e-mail, after 2 weeks.
In regards to the monitor supporting the full resolution at 60Hz with HDR and 8bit+FRC through DP1.3, they say: ``From what I can see, this should be absolutely fine. However please note that there may be no video or audio output depending on the DP version of the PC. Also make sure to use the supplied DP cable of the product, as this may cause the device to malfunction.``
Not sure what ``However please note that there may be no video or audio output depending on the DP version of the PC.`` means.
Also, in regards to why they don't have a DP1.3 mode, they are only saying: ``We would be unable to advise on the design of a monitor regarding connection compatibility. This is something that would have been decided in the development stage, which is something we have no insight into.``
Finally, in regards to getting the signal to the monitor through two DP ports at once from a single PC, they say: ``As far as our senior technical advisers are aware, they do not believe this would be possible to do. This is entirely down to the graphics card not supporting it.``