With the GTX 1060 the DX 12 performance is 9% down compared with the card running under the DX 11 API with the exact same system settings. That’s not a huge amount, but is still a problem given that there is practically zero difference between DX 12 and DX 11 performance when you throw an RX 580 into the mix. Still, at least the GTX 1080 Ti is still nailing gaming performance - it was delivering a pleasing 114fps at 1080p Ultra settings. Though it too was struggling with DX 12, losing around 14fps on average compared with the DX 11 performance.