Horizon Zero Dawn
One of the biggest games released last gen on the PlayStation 4 finally made its way to PC a few months ago. This title runs very well with Ultimate Settings, even at 4K. During my 4K gameplay bnechmarks I averaged 35fps, but it is a very stable and very playable 35fps. I have included a YouTube video below showing Horizon Zero Dawn 4K gameplay on my X58 + RX Vega 64 using the Ultimate Graphical settings.