[Doom 3] Extreme stutter and performance issues

[Tomle1202]

Describe the bug
Stutter and FPS drops during gameplay

To Reproduce
Steps to reproduce the behavior:

1. Doom 3 BFG is installed via Steam
2. Doom BFA is installed correctly by copying the content to the game's installation folder.
3. Native 2560x1440 60Hz, Vsync enabled.
4. All advanced graphical settings are turned off, except MSAA 4x.
5. FOV 100, flashlight on, muzzle flash on.

Expected behavior
FPS drops to the mid 30 during normal gameplay: walking or firing gun. Also tested with MSAA off (SMAA 1x), same result.

Desktop:

• OS: Windows 11
• CPU: Intel i7 13700
• GPU: Nvidia RTX 4070Ti
• Memory: 32GB DDR5
• GPU Driver Version: Nvidia 551.23
• Version: 1.3.1

[MadDeCoDeR]

Hi there, you can try some things that might improve the performance.

1. Try to set the launch argument +set r_useopengldsa 0 (It will disable the new OpenGL DSA implementation and use the old OpenGL code)

2. Check the instructions on the README file to enable DXGI on your system. That will make all OpenGL games to use DX12 for the final rendering

[Tomle1202]

Hi there, you can try some things that might improve the performance.

1. Try to set the launch argument +set r_useopengldsa 0 (It will disable the new OpenGL DSA implementation and use the old OpenGL code)
2. Check the instructions on the README file to enable DXGI on your system. That will make all OpenGL games to use DX12 for the final rendering

Hi, thanks for the response. Your solution works perfectly, even when I turn everything on.