4GB Fallout New Vegas

⭐ ⭐⭐⭐ (47,696 endorsements) 📥 992,875 downloads 📌 v1.6 📅 10/25/2010
⚪ Last updated 2012

By MonochromeWench · Utilities

⬇ Download Mod Source: Nexus Mods 📅 Updated: 11/22/2012 📅 Created: 10/25/2010
⚠️ Install Order · 5 steps
1🛠️ NVSE — New Vegas Script Extender Download ↗
2🛠️ 4GB Patcher — FNV 4GB Patcher Download ↗
3🔧 NVAC — New Vegas Anti Crash Download ↗
4🧩 JIP LN — JIP LN NVSE Plugin Download ↗
5🔧 YUP — Yukichigai Unofficial Patch Download ↗

Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.

🔍 Analysis

  • 👍 4.8% endorsement rate — high engagement, a strong quality signal
  • 🏆 #18 of 57 Utilities mods in this game by downloads

📋 About This Mod

READ THIS FIRST -------------- This mod contains an executable which is designed to make changes to other programs. That\'s exactly what it is supposed to do, make changes in \"FalloutNV.exe\". But it may well get flagged by your anti-virus program as potentially dangerous. While it will be a false positive, If you are not comfortable using such a mod, please don\'t. Fallout New Vegas 4GB ===================== by MonochromeWench (the.wench@wenchy.net) FNV4GB is a tool to load Fallout New Vegas with the Large Address Aware executable flag set so the entire 4GB Virtual Memory Address Space can be used by the game. This is useful when using lots of mods. This is a back port of Skyrim4GB that was originally based on older versions of FNV4GB. This version of FNV4GB has the same functionality as previously released Skyrim4GB. There are difference between this version of FNV4GB compared to older released versions of FNV4GB. Note the new command line reference below. This version of FNV4GB will, by default, write its modified executable to \\exes\\FalloutNV.exe which is different to the older behavior of \\FalloutNV. 4gb FNV4GB is licensed under the terms of the GNU Lesser General Public License version 2. 1. Read the included lgpl-2. 1.txt for the terms. Source code is included with the package. Original binaries compiled using Microsoft Visual Studio 2010. Update History -------------- 1. 6 Back ported Skyrim4GB to work with Fallout New Vegas. There are few difference between 1. 6 and Skyrim4GB 1. 5 other than code changes needed for Fallout New Vegas such executable name changes, registry path changes and other similar changes. FNV4GB will write out a log file to ~\\Documents\\My Games\\FalloutNV\\FNV4GB.log Skyrim4GB 1. 5 Fixed at least one case that was causing people to get Access Denied error messages. Changed the default laaexe to be \'.\\exes\\TESV.exe\' instead of \'TESV.exe. 4gb\'. This is so people don\'t have issues with other programs detecting when Skyrim runs. Updated the code so it wont fail if the original exe already had the LAA flag set as will apparently happen in the next Skyrim patch. If the LAA flag is already set, the loader will NOT create a modified executable. It will directly run the original exe without modifications while still injecting skse and extra dlls specified with -extradll. Added -nolaa command line options. If the original exe didn\'t have the LAA flag the loader will directly load the original exe without modifications while still injecting other dlls. If the original exe had the LAA flag set, then a modified exe will be generated with the LAA flag unset and that will then be run by the loader. Skyrim4GB 1. 4 Generally cleaned up the code. Rewrote how the helper dll is injected into the child process. Moved helper dll code out of DLLMain into its own function that gets called after the DLL has finished being loaded. I want to a

🤖 AI-enhanced — based on mod data

This utility patches Fallout New Vegas to enable the Large Address Aware flag, allowing the game to use up to 4GB of RAM instead of the default 2GB. It's a must-have for modded setups that suffer from crashes due to memory limits. With nearly 48,000 endorsements, it's a proven fix.

✨ Key Features

Enables the Large Address Aware bit for Fallout New Vegas
Allows the game to utilize up to 4GB of RAM
Simple utility with high community trust (47,696 endorsements)

📊 Pros & Cons

✅ Pros

  • Essential for modded playthroughs—stops those annoying out-of-memory crashes
  • Community staple with nearly 48k endorsements, so you know it works
  • One-and-done fix; no ongoing maintenance needed

⚠️ Cons

  • Last updated in 2012—might not be officially updated for newer game patches, but the core fix remains relevant
  • Only works if your OS and hardware support 4GB addressing (most do, but check)
  • No detailed instructions included—you'll need to know how to apply the patch manually
🎯 Is This For You?
For any Fallout New Vegas player who mods their game and hits memory crashes. Also for vanilla players who want a more stable experience. Skip if you're on a system with less than 4GB RAM or if you're not comfortable with simple file patching.
📦 Install:Easy· Under 1 minute

💡 Beginner Tips

  • Make sure you run the patcher as administrator, or it might not apply correctly.
  • After patching, verify the Large Address Aware flag is set by checking the game's executable properties or using a tool like CFF Explorer.
  • If you use a mod manager like FOMM or Vortex, apply the patch after installing mods to ensure it sticks.

📊 Mod Details

Game
New Vegas Mods
Author
MonochromeWench
Version
1.6
Downloads
992,875
Endorsements
47,696
Category
Utilities
Created
10/25/2010
Updated
11/22/2012

🔧 How to Install New Vegas Mods

Download from Nexus.

📖 Full step-by-step install guide for New Vegas →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for New Vegas commands, item IDs, and more.

Keep browsing — more New Vegas mods await

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