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Fallout: New Vegas RTX Remix installs through a project-specific Direct3D 9 wrapper, a matching RTX Remix bridge, and an xNVSE plugin. It works only with FalloutNV.exe version 1.4.0.525 from Steam or GOG, xNVSE 6.4.8 or newer, a matching New Vegas RTX runtime and bridge, and an RTX Remix-capable graphics card and driver. The crucial detail is that the project wrapper stays named d3d9.dll, while the Remix bridge is renamed d3d9_remix.dll.
Follow the project’s release instructions and keep its wrapper, plugin, and bridge in sync. Renderer replacements such as ENB and ReShade are unsupported, and using a generic RTX Remix runtime in place of the project’s matching build can prevent the setup from working.
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What do I need before installing Fallout: New Vegas RTX Remix?
Check compatibility before copying files. The mod relies on fixed-address hooks into a specific game executable, plus an xNVSE plugin and a custom Remix loading chain; having the right graphics card alone is not enough. Treat the installation as a version-matching exercise rather than as a normal texture-mod install.
- Supported game executable:
FalloutNV.exeversion1.4.0.525, from Steam or GOG. The project does not support other executable builds. Because the hooks target fixed addresses, an executable that merely looks similar or has the same game content is not an interchangeable substitute. - xNVSE: version
6.4.8or newer. xNVSE supplies the script-extender environment in which the New Vegas RTX engine-monitor plugin runs. - Matching project components: the New Vegas RTX wrapper, NVSE plugin, runtime, and bridge must be from a compatible New Vegas RTX release or build. The wrapper uses features not present in standard RTX Remix releases, so a generic runtime can be the wrong dependency even if it is newer.
- Graphics hardware and driver: an RTX Remix-capable GPU and driver. NVIDIA describes RTX Remix as its modding platform for RTX features; consult its RTX Remix overview for platform information. The project requirements do not provide a universal FPS, VRAM, or card-by-card performance table, so do not treat installation as a performance guarantee.
- No conflicting renderer replacements: ENB, ReShade, shader replacers, and New Vegas Reloaded are listed as unsupported with this setup. These tools can install or proxy their own rendering DLLs, which conflicts with the wrapper chain.
If any requirement is missing, resolve that first rather than trying to compensate by moving or renaming extra DLLs. In particular, do not assume that another game executable build is interchangeable: the project’s hooks depend on the specified version. The documented game copies are Steam and GOG; an Epic installation is not established as supported.
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Make a clean starting point
A clean starting point makes a failed launch diagnosable. Identify the directory that contains FalloutNV.exe and note whether another mod manager is already deploying root-level DLLs there. If an older wrapper, bridge, or renderer replacement is present, remove or disable it before installing the New Vegas RTX files. Keep a backup of the working folder before later runtime updates; NVIDIA’s generic update procedure also recommends backing up existing files.
Do not install the creator application merely to play the mod. NVIDIA distinguishes the tools used to create or modify Remix projects from the runtime required to run a compatible project. New Vegas RTX’s play requirements are the runtime, bridge, wrapper, xNVSE, and the specified executable.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsHow do I install the New Vegas RTX files?
Install the runtime and bridge beside FalloutNV.exe, rename the bridge DLL, then add the project wrapper and NVSE plugin in their specified locations. The complete file chain matters: the game loads the project wrapper as d3d9.dll, and that wrapper loads d3d9_remix.dll.
- Get the matching files. Use the New Vegas RTX release package or a runtime build that the project explicitly matches. NVIDIA’s generic runtime documentation says to select the
x86package for a 32-bit game orx64for a 64-bit game. For this installation, follow the architecture and file instructions in the New Vegas RTX package rather than substituting an unrelated runtime. See NVIDIA’s runtime installation documentation for the general runtime process. - Locate the game folder. It is the directory containing
FalloutNV.exe. The instructions below refer to that directory as the game folder; the relevant plugin subfolder isDataNVSEPlugins. Do not confuse the game folder with a mod-manager download or staging folder. - Put the runtime files beside the executable. Copy the runtime contents into the folder containing
FalloutNV.exe, following the project package’s layout. Preserve any runtime subfolders supplied by that package instead of flattening every file into one directory. - Rename the runtime bridge. In that same folder, rename the runtime’s
d3d9.dlltod3d9_remix.dll. Do not leave it namedd3d9.dllwhen the project wrapper is also being installed. There must be one project wrapper with the public named3d9.dlland one bridge with the private named3d9_remix.dll. - Install the project wrapper files. Copy the New Vegas RTX project’s
d3d9.dll,NewVegasRTX-Reporter.exe, andremix-comp.inibesideFalloutNV.exe. The project’sd3d9.dllis the wrapper; it is not the renamed runtime bridge. If Windows asks whether to overwrite a file, stop and check which build supplied it instead of automatically accepting the replacement. - Install the NVSE plugin. Copy
fnv_remix_nvse.dllandfnv_remix_nvse.iniintoDataNVSEPlugins. Keep this plugin and the wrapper from the same New Vegas RTX build. The plugin does not belong beside the executable, and placing it in a similarly named but incorrect folder means xNVSE will not load it. - Start the game normally. Launch Fallout: New Vegas using the usual game launcher or executable path for your installation. Do not use a different executable build as a workaround for a failed launch. A launcher change cannot repair a fixed-address mismatch.
Expected layout
The root folder should contain FalloutNV.exe, the project’s d3d9.dll, the renamed d3d9_remix.dll, NewVegasRTX-Reporter.exe, and remix-comp.ini, along with the other runtime files supplied by the matching package. Under the same game installation, the NVSE directory should resolve to DataNVSEPluginsfnv_remix_nvse.dll and DataNVSEPluginsfnv_remix_nvse.ini. NVIDIA notes that the RTX Remix Runtime is required to play RTX Remix mods; the New Vegas RTX project adds its own wrapper and plugin requirements on top.
The two DLL names are intentionally different. If the runtime bridge remains d3d9.dll, it replaces the project wrapper instead of being loaded by it. If the wrapper is renamed, the game will not enter the project’s proxy chain. This naming relationship is the most common installation detail to verify first.
Can I install it with Mod Organizer 2 instead of copying files directly?
Yes. The two practical layouts are direct installation beside FalloutNV.exe or managing the game-root files through Mod Organizer 2 with Root Builder. Direct installation makes the DLL chain straightforward to inspect in the game folder; Root Builder keeps those files managed with the mod profile and makes it easier to disable the entire setup without deleting files from the base installation.
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Whichever layout you choose, preserve the same destination logic: root-level runtime and wrapper files must appear beside the executable when the game runs, and the NVSE plugin files must resolve to DataNVSEPlugins. The project also specifies that remix-comp.ini is read from the folder containing the wrapper’s d3d9.dll. If the configuration appears to have no effect, check that it is in that folder rather than only in a mod staging directory.
Do not mix layouts casually. If Root Builder is managing the root files, avoid adding a second copy of a wrapper or bridge directly to the game folder. Duplicate or mismatched components make it harder to identify which build is loading. A useful test is to disable the profile and inspect whether the root folder is clean, then enable only the New Vegas RTX profile and confirm that exactly one wrapper and one renamed bridge are visible at launch.
How do I confirm that the RTX Remix bridge loaded?
Look for the project-specific confirmation in the wrapper log: [Proxy] Loaded Remix bridge: d3d9_remix.dll. NVIDIA also documents an RTX Remix startup splash as a generic signal, but the New Vegas RTX log line is the more direct confirmation that this project’s wrapper found its bridge. Seeing the normal game window alone does not prove that Remix initialized; the wrapper can fall back to the system Direct3D 9 DLL when it cannot load the bridge.
Logs are stored in rtx-remixlogs. The files have different roles:
remix-comp.logrecords wrapper activity, including the bridge-loading path.fnv_remix_nvse.logrecords the engine monitor and helps show whether the xNVSE plugin loaded.remix-dxvk.log,bridge32.log, andbridge64.logcover runtime components. Which bridge log is populated depends on the component and architecture in use.
After the game closes, NewVegasRTX-Reporter.exe creates a zipped report under rtx-remixlogsarchive. Run or retain the reporter as specified by the project package so a complete set of logs is available after a crash or failed initialization. This can help collect diagnostic logs if a launch or loading problem persists. The project’s New Vegas RTX documentation is the authoritative source for its required files and project-specific behavior.
A quick verification sequence
- Close the game and remove any stale log archive only if you have already saved a copy you may need for comparison.
- Check that the root-level wrapper is the project’s
d3d9.dll, not the runtime DLL under its old name. - Launch once, then inspect
remix-comp.logfor the exact bridge-loaded line. - Inspect
fnv_remix_nvse.logfor the engine-monitor side of the chain. - If the game closes, run the reporter after exit and check the newly created archive.
Why does Fallout: New Vegas crash or fail to load RTX Remix?
Start with the executable version and DLL chain, then check for unsupported renderer mods and plugin mismatches. A missing bridge, wrong wrapper, or incompatible build can keep Remix from starting even when the game itself launches.
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| Symptom | What to check | What to do |
|---|---|---|
| No Remix startup or bridge message | Whether d3d9_remix.dll is beside FalloutNV.exe, and whether the project wrapper is the root-level d3d9.dll. |
Restore the project wrapper as d3d9.dll and make sure the runtime bridge is named d3d9_remix.dll in the same folder. Check remix-comp.log. A normal game launch without the bridge line usually means the proxy chain was never entered. |
| Wrapper reports it could not load the bridge | Whether the renamed bridge exists in the game folder and whether the wrapper, bridge, and plugin are from a compatible project build. | Use the matching New Vegas RTX release components. The wrapper can fall back to the system d3d9.dll if it cannot load the bridge; in that case RTX Remix does not start. Check for a second copy supplied by a mod manager or an old DLL left by an earlier installation. |
| Game crashes or hooks behave incorrectly | Whether the game executable is exactly version 1.4.0.525, and whether the xNVSE plugin and wrapper match. |
Use a supported Steam or GOG executable and xNVSE 6.4.8 or newer. Do not assume another executable build will work with fixed-address hooks. Reinstall the wrapper and plugin as one matched pair rather than mixing files from separate downloads. |
| Problems after installing another graphics mod | Whether ENB, ReShade, a shader replacer, or New Vegas Reloaded is installed. | These renderer replacements are unsupported for this setup. Remove or disable the conflicting replacement rather than adding more rendering DLLs. Test New Vegas RTX by itself before restoring unrelated visual mods. |
| Issues with NVTF installed | The settings in DataNVSEPluginsnvtf.ini. |
Under [DirectX], set bUseDefaultPoolForTextures = 1; under [Main], set bModifyDirectXBehavior = 1. The project notes that the first setting can affect Alt-Tab in exclusive fullscreen, so test your display mode after changing it. |
| Configuration changes do not appear | Whether remix-comp.ini is beside the wrapper’s d3d9.dll. |
Move or deploy the configuration to the directory containing that wrapper. Settings marked “restart” in the in-game Remix menu take effect on the next launch; changing the file while the game is running will not apply those options immediately. |
| Only one architecture log appears | Whether you are expecting both bridge32.log and bridge64.log even though the selected runtime has one applicable architecture. |
Use the architecture specified by the project package. NVIDIA’s generic guidance is x86 for a 32-bit game and x64 for a 64-bit game; do not add an unrelated package simply to create another log. |
| Update broke a previously working install | Whether a generic RTX Remix update replaced the project’s custom bridge or wrapper. | Restore the backed-up files, then use only a runtime release explicitly supported by New Vegas RTX. A newer generic release is not automatically compatible with the project’s custom loading chain. |
When troubleshooting, change one mismatch at a time and inspect the relevant log after relaunching. If you change the wrapper or plugin, keep them from the same build; if you change a runtime component, confirm that the project supports that exact matching build. Replacing files indiscriminately can hide the original problem by creating a second version mismatch.
What the fallback means
If the wrapper cannot load d3d9_remix.dll, it falls back to the system d3d9.dll. That behavior can make the game appear to launch normally while RTX Remix is absent. The absence of the project-specific bridge line is therefore meaningful even when there is no immediate crash. Verify the file name, location, and build relationship before investigating graphics settings.
How do I change settings or update the mod?
Most wrapper settings are in remix-comp.ini and can also be adjusted through the in-game Remix menu, opened with Alt+X. Settings marked “restart” require another launch before they apply. Keep the configuration beside the wrapper so both direct installs and Root Builder deployments resolve the same file.
For generic RTX Remix runtime updates, NVIDIA advises backing up existing files, unzipping the update beside the executable or existing .trex folder, and using Alt+X to verify the updated menu. That generic procedure is not permission to replace the New Vegas RTX runtime with any new generic release: this project depends on a custom bridge and matching wrapper/plugin build. Update only to a runtime the project explicitly supports, and retain a recoverable copy of the working files before replacing anything. NVIDIA also cautions that compatibility and quality can vary until individual mod authors update their projects. Its runtime installation instructions and RTX Remix FAQ provide the generic platform context; the New Vegas RTX project documentation governs compatibility for this game.
There are no source-backed FPS, VRAM, or performance figures for this installation procedure. A successful load confirms the mod’s runtime chain is present; it does not establish a particular frame rate or performance level. Judge performance only with a separate, dated benchmark for your exact hardware, driver, scene, and settings.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Fallout: New Vegas RTX installation FAQ
Will the New Vegas RTX mod work with the Epic Games version?
The documented supported game copies are Steam and GOG, both using executable version 1.4.0.525. The available project requirements do not establish support for an Epic Games build, so do not assume it is compatible. Even if an Epic executable reports a similar game version, the project’s fixed-address hooks require the specifically supported binary.
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Do I need the RTX Remix Creator application to play the mod?
The installation requirements call for the runtime and bridge, not the creator application. NVIDIA’s FAQ distinguishes Remix’s modding tools from the runtime needed to play compatible mods. Install the creator tools only if you have a separate authoring task; they are not listed as a New Vegas RTX playback prerequisite.
Can I use a different RTX Remix release if it is newer?
Not unless the New Vegas RTX project explicitly supports that release. Its wrapper relies on a custom bridge and matching plugin components, so newer generic runtime files are not automatically interchangeable. Back up the working installation, check the project’s release notes, and update the complete matched set rather than replacing one DLL.
Where do the RTX Remix DLLs go?
The project wrapper named d3d9.dll and the renamed bridge d3d9_remix.dll belong beside FalloutNV.exe. The xNVSE files fnv_remix_nvse.dll and fnv_remix_nvse.ini belong under DataNVSEPlugins. Keeping those destinations distinct is essential to the loading chain.
Do I need xNVSE?
Yes. New Vegas RTX requires xNVSE 6.4.8 or newer, and its engine-monitor plugin is installed under the xNVSE plugin directory. A working wrapper without the required xNVSE environment does not satisfy the project’s requirements.
Where is the crash report after I run NewVegasRTX-Reporter.exe?
The reporter creates a zipped report in rtx-remixlogsarchive after the game closes. The related log files in rtx-remixlogs can help identify whether the issue is in the wrapper, NVSE monitor, or runtime.
Can I keep ENB, ReShade, or New Vegas Reloaded enabled?
Those renderer replacements are listed as unsupported with this setup. Disable them while testing New Vegas RTX; adding additional proxy DLLs can prevent the project wrapper from loading or make a failure ambiguous.
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Why does changing remix-comp.ini do nothing?
The file is read from the directory containing the wrapper’s d3d9.dll. Confirm that Root Builder or a direct install places remix-comp.ini beside that wrapper, then restart the game for settings marked “restart.”
Frequently Asked Questions
Will the New Vegas RTX mod work with the Epic Games version?
The documented supported game copies are Steam and GOG, both using executable version 1.4.0.525. The available project requirements do not establish support for an Epic Games build, so do not assume it is compatible.
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The installation requirements call for the runtime and bridge, not the creator application. NVIDIA’s FAQ distinguishes Remix’s modding tools from the runtime needed to play compatible mods.
Can I use a different RTX Remix release if it is newer?
Not unless the New Vegas RTX project explicitly supports that release. Its wrapper relies on a custom bridge and matching plugin components, so newer generic runtime files are not automatically interchangeable.
Where do the RTX Remix DLLs go?
The project wrapper named d3d9.dll and the renamed bridge d3d9_remix.dll go beside FalloutNV.exe. The xNVSE files belong under DataNVSEPlugins.
Do I need xNVSE?
Yes. New Vegas RTX requires xNVSE 6.4.8 or newer, with its engine-monitor plugin installed in DataNVSEPlugins.
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Use FalloutNV.exe 1.4.0.525 from Steam or GOG, xNVSE 6.4.8 or newer, and one matching New Vegas RTX build. Keep the project wrapper as d3d9.dll, rename the matching Remix bridge to d3d9_remix.dll beside it, place the NVSE plugin under DataNVSEPlugins, and verify [Proxy] Loaded Remix bridge: d3d9_remix.dll in the logs. Avoid unsupported renderer replacements and generic runtime swaps.
