Fallout: New Vegas with DXVK: the sourced setup

Should you use DXVK in New Vegas?

We cannot tell you from measurements: none exist yet. What we can say: DXVK’s own team carries built-in settings for this game and named it in three releases’ notes, which suggests it is a game DXVK is used with. Whether it helps on your PC is yours to test, and it is easy to undo. On a GPU too old for 3.x, see DXVK 1.10.3 and Sarek.

Install DXVK for Fallout: New Vegas

To undo it, delete the DLL: see the uninstall guide. The general steps, with the checklist and warnings, are on the Windows install page.

What DXVK already does for this game

The profile matches the game’s exe and its launcher. DXVK sets strict float emulation for Direct3D 9 and hides an NVIDIA GPU from the game’s Direct3D 9 path. We have not tested what these do for the game.

DXVK applies these automatically when it recognises the exe name, so you do not need to copy them into a dxvk.conf. The release notes of DXVK 1.7, 2.4 and 3.0 name this game among their fixes.

Capping FPS

Old engines can misbehave at very high frame rates, which is why people look for a cap. In DXVK 3.x use dxvk.maxFrameRate in dxvk.conf (our measured cap mechanics are on the FPS limit page); the old DXVK_FRAME_RATE variable is gone (F21).

What we have not tested

• Any run of the game: FPS, stutter and crashes are unmeasured, so we make no speed claim.
• Whether DXVK is better or worse than the game’s normal Direct3D on your GPU.
• Mods and fixes: xNVSE, NVTF, the 4 GB patch, the Heap Replacer, Viva New Vegas and Tale of Two Wastelands setups. Community guides say this game needs a 4 GB memory patch to use more than 2 GB; our checker reports whether your exe is Large Address Aware
• Whether the game’s online features still exist.

Check your own copy

The Game Checker reads your .exe on your device and tells you its bitness and Direct3D version. Our checker also flags files in the game folder that use the same name as DXVK’s DLLs.