Dishonored 2, Witcher 3, Dawn of War III, DiRT 4
Dishonored 2
Unlike Mass Effect Andromeda, we've found that in the past AMD's not super competitive in Dishonored 2. We certainly see that here we comparing Vega 56 and the GTX 1070 at 1080p and 4K. Looking to the 1440p results the GTX 1070 was 14% faster and that's quite a margin, more crucially whereas the 1070 average well over 60 fps, Vega fell short of the desired frame rate.
The Witcher 3: Wild Hunt
Looking back to The Witcher 3: Wild Hunt we see that Vega is competitive in this title but at the same time it's not really beating the much older GTX 1070 either. It edged ahead at 1080p and 4K but the results won't really wow anyone. Meanwhile at 1440p Veag 56 was a few frames faster but again doesn't really offer anything new at the $400 price point.
Warhammer 40,000: Dawn of War III
The Dawn of War III results are very much a mixed bag and we see that here when looking at 1080p and then 4K. The Radeon GPU was slightly slower at 1080p while it pulled into the lead at 4K. Quite shockingly though it puts fourth by far its best result at 1440p where it matched the GTX 1080. This is a somewhat baffling results but having re-tested twice we was faced with the same confusing results. Not sure what's going on here but we're keen to look into it more shortly.
DiRT 4
DiRT 4 threw up some more highly confusing numbers so again please take these with a grain of salt until we have more time to confirm them or someone else shows the same or similar performance. Rather than disregard these results we re-tested Vega 56 as well as the GeForce 10 series cards and kept finding the exact same results. All the quality settings were the same and visually Vega looked like it was rendering everything the same.
For whatever reason Vega 56 was able to beat the GTX 1080 at 1440p and even crush the GTX 1080 Ti's minimum result. This goes against everything seen so far, so again take these numbers with a grain of salt until we can confirm them with at least one other source.