Vulkan versus DirectX 11 in World War Z – Higher framerates but major stutters

World War Z has just been released on the Epic Games Store. The game is powered by the Swarm Engine and since it supports both the Vulkan and DirectX 11 APIs, we’ve decided to put them to the test on both NVIDIA’s and AMD’s hardware.

For this benchmark test between Vulkan and DX11, we used our Intel i7 4930K (overclocked at 4.2Ghz) with 16GB of DDR3 RAM at 2133Mhz, NVIDIA’s RTX 2080Ti, AMD’s Radeon RX580 and Radeon RX Vega 64, Windows 10 64-bit and the GeForce 425.31 and AMD Radeon Software Adrenalin 2019 Edition 19.4.2 drivers.

Saber Interactive has included a built-in benchmark tool, however we’ve discovered that the Tokyo mission was more demanding than it. As such, we’ll be testing that area for our benchmarks.

Let’s start with the good news; Vulkan was offering higher framerates on both AMD’s and NVIDIA’s GPUs. At 1080p and Ultra settings, we noticed a 10fps performance boost on all of our graphics cards.

However, Vulkan currently suffers from some major stuttering issues on both AMD’s and NVIDIA’s hardware. To be honest, the game, especially on the NVIDIA GeForce RTX2080Ti, was almost unplayable due to these stutters. As such, we strongly suggest avoiding the Vulkan API until Saber addresses these stuttering issues.

Stay tuned for our PC Performance Analysis article that will go live in the next couple of days!

23 thoughts on “Vulkan versus DirectX 11 in World War Z – Higher framerates but major stutters”

    1. because low level API is more complicated. why Direct X and OpenGL exist in the first place? it was so that developer no longer have to deal with low level (doing more work with the hardware) and concentrate on creating their games instead.

  1. Online multiplayer is reportedly a barren wasteland for this game whereby people are having to let bots fill the empty player slots.

    I suppose that’s what happens when your game is exclusive to Epic Games Store.

    1. No drivers yet at the time of this testing. Also, just not a very well optimised game. Give it a couple months

          1. Excuses lol, I was pointing put it takes Nvidia months to get proper Vulkan performance.

          2. Not optimised for Nvidia…. I’m sure you saw the charts. You even damage control when it’s not needed lol

          3. I don’t actually. I just showed to you what you people are used to be doing when it comes to nVIDIA sponsored games. Only that you literally brush-off the whole optimisation argument with a comment like “AMD is garbage”.

            You do EXACTLY what i did and you find it normal. But when a game isn’t optimised for nVIDIA, it’s all the game developer’s fault, isn’t it?

            And then you come with the “damage control” argument. You people never change…

    1. Game is bad and stutters because it stutters on nVidia HW. always the same. thanks for the video. but the game is really not that smooth on vulkan-radeon-VII

  2. I was actually somewhat interested in this game until I today realized it’s FKIN EPIC STORE EXCLUSIVE! NO THANKS!

  3. I use GTX1050 Ti (a Gigabyte card). When I set to use DX11, motions in during the game caused stutterings. It did not happen when I changed to Vulkan.

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