Vulkan and DirecX12 limiting fps

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Brudorino wrote:
I fixed the 48 fps cap by changing graphics card position, was using it on pci express x2 and changed it to x4. I'm using a 960 gtx. Hope it helps anyone out there, cheers.

I switched from PCIe2 to PCIe 4 and the cap changed from 42 to 94
Same for me, i5 9600k, 6700xt

Weirdly though, this morning Vulkan worked like a charm for me, no issues at all. Come home from work, and both DX12 and Vulkan are back to locking frames at 24.
Msi HD7870 Hawk and Fx4330
Today i got an update for 200mb and my game got fpslocked on 24 fps when im using Vulkan. When im changing to Dx11(What works so bad for my Pc) it's all Ok with fps, if im changing to Dx12, it's fpslocked on 14-18fps(randomly). Im nothing change in my Pc or settings from prev days. Please FIX
Same issue here, hard locked at 24 fps when on vulkan/dx12. Running a 2080 Super.... was fine for a few days then BAM, locked fps
same problem here! i7 11700k, RTX 2060 when i switch to dx12 or vulkan my fps cap in 24 fps
same here, at the start of the league my fps was capped 80, but yesterday change to 47/50
i tried everything, nothing works

GPU 3060ti
CPU i7 9700k
Last edited by Spinstorm#1640 on Sep 3, 2023, 5:10:58 PM
I had this issue at the start of the league and noticed after that my monitors native refresh rates got changed to 120. It may not work for everyone in here but check in the Windows Display setting for your monitors and make sure they didn't change there.
Same here, Win 10, GTX 1070, Ryzen 5 1400 & Ryzen 5 5600x, locked to 13 FPS.

Removing and reinserting the graphic card into Slot 2 changed the cap to 54, inserting into slot 1 removed the cap.
Last edited by Platinwing#4413 on Nov 1, 2023, 12:59:34 PM
This happened to me too since affliction league launch...
Fps capped at 47/48 on Vulkan and Dx12. Dx11 stuttering and unplayable.

Ryzen 5 2600, amd 6700 xt, 16gb ram

EDIT (Solved): After an intense search got the answer. My gpu was wrong seated (loose)! it can be also if you have a PCI card (audio, wi fi, etc) that makes your GPU work in less than 16x pci lanes! You can look with GPUz software! (give a stress test to your gpu when you open GPUz and look for how many pci lanes is using!!) If your gpu is using 8x, 4x or 2x pci lanes, that is why PoE caps your fps.
Last edited by leomirotti#2771 on Jan 2, 2024, 5:18:34 PM
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leomirotti wrote:
This happened to me too since affliction league launch...
Fps capped at 47/48 on Vulkan and Dx12. Dx11 stuttering and unplayable.

Ryzen 5 2600, amd 6700 xt, 16gb ram

EDIT (Solved): After an intense search got the answer. My gpu was wrong seated (loose)! it can be also if you have a PCI card (audio, wi fi, etc) that makes your GPU work in less than 16x pci lanes! You can look with GPUz software! (give a stress test to your gpu when you open GPUz and look for how many pci lanes is using!!) If your gpu is using 8x, 4x or 2x pci lanes, that is why PoE caps your fps.


I have similar med/high end specs and was getting capped at 24-27fps on Vulkan/DX12 since at least Affliction league as well.

For those coming to this post looking for answers, that one above kinda solves it. I ran GPUz and it said 1x, when the card supports 8x. I moved the GPU one slot below and it read the same thing, then I moved the GPU up two slots, double checked that everything was seated correctly, and now GPUz reports 8x, and on DX12/Vulkan I am now getting capped at 165fps (my monitor Hz).
Last edited by Winkling#1100 on Jan 26, 2024, 2:05:43 PM

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