I am using 5M DP cable (HDMI did not worked, neither miniDP). Mine is from amazon.co.uk "Ugreen"
Note it was using MSI GTX760 and it seemed it used higher voltage.
I am happy with this monitor except that I use all 4 sources (TV box, chromecast, laptop, PC), and it is pain to switch, as detection seem to be broken. E.g. I expected that turning on PC would automatically switch to "new" source - which is not the case...
I managed to program serial->usb cable to switch it on PC turn on - but it was more hassle than help.