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Fallout3 WinXP-7-8-10 Multicore Threading 4GB LAA - All versions 2023
By Carinth
Works with all game versions, original CD version to newest game platform version. Steam, GoG and Epic Games
Works with Steam Deck Also
Works with all operating systems
No other performance mods required.

This should help to:
Eliminate Crashes
Fix Stutters
Greatly Improve Performance
Lower Load Times
Faster FPS
Helps fix Crash on Start or Will not Start issues
Fixes Game Bugs and Other ingame issues.
Provides 4GB Large Address Aware
Includes all notes to help get you on your way to play.

One fix for vanilla game players, or a game fix for a stable mod platform.
Does not require a mod installer or change game content.
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Created by
Carinth
Online
Category: Modding or Configuration
Languages: English
Posted
Updated
5 Feb, 2016 @ 7:28am
19 Dec, 2023 @ 3:17pm
3,359 Unique Visitors
54 Current Favorites
Guide Index
Overview
Setup Guide 
Comments
Setup Guide
4GB MCTF - Multi-Core Threading Fix, for short

One thing to note: If you have run the game in the past, you could have older ini files that need deleted first. If this is the case, first delete all files in the "documents/mygames/fallout3", all but the save game folder.

Then do the following.

Step One - Set Your Ingame GPU

Go to Windows10 Settings, System, Display, Graphics settings
Click Browse and goto the game folder
Steam: C:\Program Files (x86)\Steam\steamapps\common\Fallout 3 (goty)
GOG: C:\Program Files (x86)\GOG Galaxy\Games\Fallout 3
Epic Games: C:\Program Files\Epic Games\fallout3\Fallout 3 GOTY English
Select the Fallout3.exe

Once selected Fallout3.exe will appear under the "Browse" button.
Select it and click "options", select High performance and save.
(Use the AMD or Nvidia setting if available)
This will set the GPU for you.
You can do the same for any other games you have.

If Just Using an Intel GPU

Goto the following link and download the intel bypass file.
https://www.nexusmods.com/fallout3/mods/17209/?
Use the d3d9.dll only. Place in the game folder.

Try running the game and check it.


Step Two - Add The 4GB Large Address Aware and Multi-Core Threading Fix

Simple Apply the 3 file changes as described in the mod below.
Full information and installation available through the below mod links.

https://www.nexusmods.com/fallout3/mods/21888
or here:
https://www.moddb.com/mods/fallout3-winxp78-multicore-threading-4gb-laa

Works with all versions including Steam, GoG, Epic Games and Steam Deck.
This enables support for 4GB LAA (Large Address Aware), Multi-core and Threading. As well as 4GB LAA (Large Address Aware) for FOSE.

Video's Provided

Full Vanilla Playthrough Main Quest with Just this fix added.
No Crashes or Errors, uncut/unedited recordings


Step Three - Please restart your system. Run Game Normally.

*Note: For Users with Higher mHz Monitors, if you experience excessive game speeds, also install the excessive speed fix provided on the listed mod from step two.

*** German version: you probably will also need the winlive fix, since that never had winlive removed, Winlive fix here
https://www.nexusmods.com/fallout3/mods/1086

Thanks all and enjoy your game.
22 Comments
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Carinth  [author] 30 Apr, 2024 @ 6:29pm 
@Brodiny The only way to fully remove the UFP patch is to do a clean install. You need to uninstall and also delete the game folder to clear it out of the game.
Hex: Mari Ibarra 30 Apr, 2024 @ 1:49pm 
I am afraid I've painted myself into a corner using Updated Unofficial Fallout 3 Patch, and if I try to remove it now it'll break a lot
Carinth  [author] 28 Apr, 2024 @ 2:12pm 
It should work with it and any other mod fine. But UFP can cause it's own issues that cannot be corrected as they are inherent to the mod itself.
Hex: Mari Ibarra 28 Apr, 2024 @ 12:32pm 
I was wondering do you know if this works with Updated Unofficial Fallout 3 Patch? (No stress if you don't)
Carinth  [author] 14 Mar, 2024 @ 9:43pm 
@Nanachi not just a recording overlay, but a graphics overlay or program overlay. A background program that could be running that. The radeon overlay is known to cause issues in several games.
Here's an example of what I mean https://forums.tomshardware.com/threads/which-background-program-is-making-my-games-crash.3269272/#post-20047068
https://help.ea.com/en/help/origin/origin/programs-that-may-cause-conflicts-with-origin/
If you are using discord, turn off it's overlay. Things like that.

Best way to test is to do a clean boot on windows by disabling your start up apps and testing to see if the problem is resolved. If it is you then know it is one of the apps causing the issue.

Get back to me on this and I will then try some alternatives
Ralsei_gaming 14 Mar, 2024 @ 9:22pm 
No, i have zero recording overlays when loading the game (also sorry for the wait got busy for a long time)
Carinth  [author] 14 Mar, 2024 @ 12:57pm 
@Nanachi are you using any overlays, , say an enb or other type of program, recording type overlay?
Normally if the game is able to start loading, but kicks out after a moment it is a good indicator of an overlay issue.
Ralsei_gaming 14 Mar, 2024 @ 11:53am 
Unfortunately, this didn't work for me. But raven is correct it is very clear, for hardware im running an amd radeon 7900 xtx and a amd ryzen 9 5950x, and as for start-up issues i can get as far as the second tic of the loading circle after clicking new game then it crashes, if your willing to help i would greatly appreciate it.
Carinth  [author] 10 Mar, 2024 @ 10:31am 
@Raven thanks, may I ask what hardware are you using? I maybe able to suggest something that could help. As well as the type of start-up issue you're having.
Raven Zenobia 10 Mar, 2024 @ 9:10am 
Unfortunately, this didn't work for me. I appreciate the clarity and the work tho, you are awesome.