While AMD hardware fares better, the advantage when using Vulkan is much less than you’d see in 1440p and 1080p testing. This is probably down to many cards being unable to deal with the intense graphical preset and not having the required horsepower to leverage extra frames in Vulkan.
When the resolution is set to 4K, performance gains are practically non-existent on NVIDIA GPUs. The GTX 980Ti and GTX 1080’s benefits are massively reduced and unlike those seen during the 1080p benchmark. Here we can see, the R9 Fury X takes the third spot for the first time and outclasses one of the higher-end Pascal products. The R9 Nano’s performance is marvellous and maintains the same minimum frame-rate as the Palit GameRock Premium GTX 1070. Once again, the R9 390X outperformed the GTX Titan X which really defies belief. The GTX 980 and GTX 1060 are well behind mid-tier AMD graphics solutions although they can provide a good 60 frames-per-second experience. The Sapphire Nitro R9 380X achieves almost double the frame-rate of its closest rival and remains within touching distance of the GTX 970. Throughout the 1440p Vulkan benchmark, AMD products are in their element and I was astounded by the widespread performance gains. It’s not just improvements for AMD hardware though as the GTX 980Ti and GTX 1080 enjoy higher frame rates when using the Vulkan API. The R9 Nano manages to maintain wonderful performance figures and the Fury X exhibits a massive frame-rate boost which is incredibly close to the GTX 1070.
Unbelievably, the R9 390X defeats the Titan X in the average frame-rate stakes while being much cheaper.
This time, the GTX 980 is easily beaten by the R9 390 and RX 480. Next up is the GTX 970 which posts impressive numbers but falls behind the GTX 1060. This means the frame-rate appears less jarring and the slight hitching has subsided. For example, the R9 380X now destroys the ASUS STRIX GTX 960 and maintains a minimum frame-rate above 60. AMD cards benefit immensely from Vulkan’s lower CPU overheads and become much more competitive. Switching the API from OpenGL to Vulkan has a dramatic effect on both the ranking order and frame rates. Doom – 1080p, 1440p and 4K Vulkan Benchmarks