Hello Spitfire.gg, thank you for your post. Usually the Vulkan mode should increase the performance of the game and FPS range whereas the DirectX version is better for graphical fidelity.
Have you tried lowering some of your graphical settings in Vulkan mode to see if you are able to achieve an FPS gain? Can you also check that both versions of the game are fully updated?
I would also recommend following the steps in this article to see if you can increase you FPS performance in game -
https://support.ubisoft.com/en-GB/Article/000062514/
As well as this, if you happen to be using a series 10 Nvidia GPU or later, enabling Nvidia Reflex in the Vulkan mode of the ... Read more
Have you tried lowering some of your graphical settings in Vulkan mode to see if you are able to achieve an FPS gain? Can you also check that both versions of the game are fully updated?
I would also recommend following the steps in this article to see if you can increase you FPS performance in game -
https://support.ubisoft.com/en-GB/Article/000062514/
As well as this, if you happen to be using a series 10 Nvidia GPU or later, enabling Nvidia Reflex in the Vulkan mode of the ... Read more