To fix crashes in Fallout: New Vegas, you should first try verifying the game’s files and updating your video card drivers, then install community-made mods like the FNV 4GB Patcher to enable more RAM, and NVSE to fix engine bugs.
If Fallout: New Vegas keeps crashing (either on startup, after loading a save, or randomly while playing), you’re not alone — it’s a common issue, especially on PC. The good news? There are tried-and-true fixes.
🔧 Quick Fixes (PC – Steam, GOG, or Epic)
✅ 1. Run as Administrator
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Go to your game folder (e.g.,
Steam\steamapps\common\Fallout New Vegas). -
Right-click
FalloutNV.exe→ Properties → Compatibility tab. -
Check:
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✅ “Run this program as an administrator”
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✅ “Disable fullscreen optimizations”
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✅ 2. Install the Unofficial Patch (YUP)
The Yukichigai Unofficial Patch (YUP) fixes hundreds of bugs and crashes:
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Get it from Nexus Mods.
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Use a mod manager like Vortex or Mod Organizer 2 for easy installation.
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✅ 3. Use the 4GB Patch
New Vegas was designed for 2GB RAM. The 4GB Patcher increases memory use and prevents crashes.
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Install from Nexus Mods – 4GB Patcher.
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It makes the game Large Address Aware (LAA), which helps stability.
✅ 4. Install NVSE (New Vegas Script Extender)
Many stability mods require NVSE:
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Download from: https://nvse.silverlock.org/
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Extract contents into your game folder.
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Launch the game via
nvse_loader.exe.
✅ 5. Stability Mods (Highly Recommended)
These fix many crash sources:
| Mod | What it Does |
|---|---|
| NVAC (New Vegas Anti Crash) | Prevents random memory crashes |
| NVSR (Stutter Remover) | Reduces stutter and micro-freezes (use older versions or tweak .ini) |
| Heap Replacer | Replaces default memory heap to avoid crashes |
All are available on Nexus Mods.
✅ 6. Limit FPS (Avoid Physics Bugs & Crashes)
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Use NVIDIA Control Panel or Radeon Software to limit FPS to 60.
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Or use an external tool like RivaTuner Statistics Server (RTSS).
❗️ Fallout: New Vegas’s engine breaks above 60 FPS — this causes crashes, animation glitches, and physics bugs.
✅ 7. Use Compatibility Mode (if on Windows 10/11)
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Right-click
FalloutNV.exe> Properties > Compatibility. -
Check “Run in compatibility mode for: Windows 7”.
✅ 8. Disable Mods (If You’re Using Any)
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A conflicting or broken mod could cause your crash.
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Disable mods one-by-one to isolate the issue.
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Start the game without any mods to test stability.
🧯 Crash Scenarios & Fixes
| Crash Scenario | Likely Fix |
|---|---|
| Crashes on Startup | Missing NVSE or 4GB patch; try compatibility mode |
| Crashes After Loading Save | Corrupt save or mod conflict; try older save or clean start |
| Random CTDs (Crash to Desktop) | Install NVAC, 4GB patch, YUP |
| Crashes When Loading Mods | Broken/incompatible mods; use LOOT to sort load order |
| Infinite Loading Screens | Use NVTF (New Vegas Tick Fix) and verify load order |
💡 Pro Tip: Use Mod Organizer 2
Unlike Vortex or manual installs, MO2 keeps your game folder clean and makes it easy to troubleshoot crashes by enabling/disabling mods without affecting the core files.
✅ Console Notes
If you’re playing on:
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Xbox (backward compatible): Try clearing cache (hold power button for 10 seconds).
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PlayStation: Reinstall the game or use cloud save rollback.
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Steam Deck: Use Proton GE + install NVSE via Vortex in Desktop mode.
