I just bought a new 4k monitor, and managed to overclock it to 81hz- but the displayport 1.2 cable that came with it can't carry above 4k at 60hz as I know, so I searched and searched for a dp 1.3 but can't find one anywhere! Displayport 1.4 has been released already, so surely 1.3 would be commonplace right now? Can anyone help? Will my monitor even have a dp 1.3 slot?