Uncharted 4 Avx2 Fix -

UNCHARTED: Legacy of Thieves Collection first launched on PC in October 2022, it arrived with a strict AVX2 (Advanced Vector Extensions 2)

instruction set requirement. This hardware limitation meant that players with older—yet otherwise capable—CPUs like Intel’s Sandy Bridge (i7-2600K) or Ivy Bridge (i7-3770K) were unable to even launch the game. The Official Fix: Version 1.3 November 16, 2022

, developer Iron Galaxy released a significant update (Version 1.3) that officially added support for older CPUs without AVX2. Fallback Executables

: The game now detects if a CPU lacks AVX2 and automatically switches to fallback executables: (Uncharted 4) or (The Lost Legacy). Performance Optimization

: By using separate executables, users with newer CPUs can still benefit from AVX2 performance gains without being held back by code compatible with older hardware. Other Fixes

: This same patch also improved mouse behavior, specifically fixing camera control loss in windowed mode and camera issues while strafing. Community and Third-Party Solutions

Before the official patch, the community attempted various workarounds, which are now largely obsolete but notable for historical context: SDE Emulators : Some players tried using the Intel Software Development Emulator (SDE)

to emulate AVX2 instructions. However, this resulted in unplayable performance, often hovering between 7–15 FPS with frequent crashes. Manual Bypasses

: Unofficial "fixes" and scripts appeared on forums like Steam and Reddit shortly after launch to try and bypass the startup check. Technical Context: Why AVX2?

AVX2 is an instruction set that allows CPUs to perform more mathematical calculations per cycle, which is highly beneficial for modern physics and rendering engines. While it improves frame rates, it was widely considered a "sloppy oversight" to make it a hard requirement at launch, given that the base PS4 hardware the game originated from used older Jaguar cores that did not support it. Steam Community performance optimization

tips for running the game on older hardware now that it's patched?

The story of the Uncharted 4 AVX2 fix is a tale of a modern PC port clashing with aging hardware, followed by a swift response from the developer to save the experience for thousands of players. The Barrier: A Technical Gatekeeper

When the Uncharted: Legacy of Thieves Collection launched on PC in October 2022, many players with older but still capable CPUs—such as the Intel Sandy Bridge or Ivy Bridge generations—found they couldn't even launch the game. The culprit was a requirement for AVX2 (Advanced Vector Extensions 2), a set of CPU instructions that older processors simply didn't have.

Players on Steam Community and Reddit expressed frustration, as these CPUs often exceeded the raw power of the original PlayStation 4 hardware but were barred by this "technicality". The Workarounds: Community Innovation

Before an official fix arrived, the community scrambled for solutions:

Emulators: Some attempted to use the Intel Software Development Emulator (SDE) to trick the game into running, though this often resulted in unplayable performance and frequent crashes.

Unofficial Patches: Modders and community members on forums like cs.rin.ru explored ways to bypass the instruction check, though these were often unstable. The Resolution: The Official Patch

Recognizing the issue, developer Iron Galaxy Studios released an official update on November 16, 2022.

Fallback Executables: The patch introduced a clever fix: if an older CPU is detected, the game automatically switches to a fallback executable (like u4-l.exe) that doesn't require AVX2.

No Performance Loss for Others: This method allowed users with modern hardware to continue benefiting from AVX2 optimizations without impacting their performance.

Reports on DSOGaming confirmed that this "Patch 3" effectively removed the AVX2 restriction, finally allowing "potato" PC owners to join Nathan Drake on his final adventure. uncharted 4 avx2 fix

Fix 3: Force Software AVX2 via Wine/Proton (Linux workaround)

If you dual-boot or use Steam Deck (older CPU? unlikely), you can run the Windows version through Wine with AVX2 emulation.

WINEDLLOVERRIDES="version=n,b" wine U4.exe

Some custom Wine builds (like Wine-tkg) include libavx2emu.

Fix 2: Use SDE (Intel Software Development Emulator) – Advanced

Intel’s SDE (Software Development Emulator) can emulate AVX2 on older CPUs.

1. Download Intel SDE from Intel’s website.
2. Extract to a folder.
3. Create a batch file (uncharted_avx2.bat) with:

   sde64.exe -mix -- "C:\path\to\Uncharted4.exe"
   

4. Run the batch file.

Drawback: SDE is very slow (20–30 FPS max). Only for low-resolution testing, not full playthroughs.

Does Your CPU Need the Fix?

If you aren’t sure whether you need this guide, check your CPU:

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Go to the Performance tab.
3. Look at the CPU name.

CPUs that DO NOT need the fix:

• Intel: Haswell (4xxx), Broadwell (5xxx), Skylake (6xxx) and newer.
• AMD: Ryzen (all generations, including 1000 series), Threadripper, EPYC.

CPUs that DO need the fix (Incompatible):

• Intel: Sandy Bridge (2xxx), Ivy Bridge (3xxx), Nehalem/Westmere (very old).
• Note: Some early Haswell chips (i3-4130, i5-4430) technically have AVX2, but motherboard/BIOS conflicts sometimes disable it. Check with CPU-Z.
• AMD: Bulldozer, Piledriver, Steamroller, Excavator (FX-8000/6000 series), Phenom, Athlon.

If you fall into the second category, keep reading.

Step 3: The "AVX to SSE" Patcher Method (Higher Risk)

Some community modders create "patches" or modified .exe files that replace the AVX2 instructions with SSE instructions that older CPUs understand.

• Where to find it: These patches are usually found on GitHub repositories or PC modding forums (search "Uncharted 4

Uncharted 4 AVX2 Fix (often referred to as the "AVX2 Bypass") is a vital community-made patch for PC players running older CPUs that lack Advanced Vector Extensions 2 support. While the Uncharted: Legacy of Thieves Collection

officially requires AVX2, this fix allows the game to boot and run on older—yet still capable—hardware like Intel Ivy Bridge or AMD Phenom processors. The Problem: The AVX2 Hard Wall

Upon its PC release, many players with older high-end CPUs (such as the legendary i7-3770K) found they could not even reach the main menu. The game would simply crash to desktop or throw an error because the executable relied on AVX2 instructions that these older architectures physically do not have. The Solution: How the Fix Works The fix is typically distributed as a modified or a replacement executable (often found on Nexus Mods ). It works by: Instruction Translation:

Intercepting the AVX2 calls and redirecting them to standard AVX or SSE instructions. Bypassing Checks:

Removing the initial hardware "handshake" that prevents the game from launching on unsupported CPUs. Performance & Stability Playability:

Surprisingly, once the AVX2 barrier is removed, the game runs remarkably well. Since Uncharted 4

was originally designed for the Jaguar CPU in the PS4 (which also lacks AVX2), the engine isn't inherently "broken" without it; the requirement on PC was largely an optimization choice by Naughty Dog/Iron Galaxy. Frame Times:

You may notice slightly higher CPU usage or occasional stuttering compared to a native AVX2 system, as the CPU has to work harder to process the "translated" instructions. Crash Frequency:

Most users report a stable experience, though some specific scripted sequences or heavy physics-based combat transitions may cause rare crashes. The Verdict The AVX2 fix is a

for budget-conscious gamers or enthusiasts keeping older rigs alive. It proves that the AVX2 requirement was more of a "soft" optimization gate rather than a fundamental necessity for the game to function.

Enables play on older, popular hardware (Intel 3rd Gen, older AMD FX). Easy to install (usually a simple file drag-and-drop). Maintains surprisingly consistent frame rates. Not officially supported; game updates may break the fix. Minor performance overhead due to instruction emulation. for the current version of the fix? UNCHARTED: Legacy of Thieves Collection first launched on

Uncharted 4: Legacy of Thieves Collection now officially supports older CPUs without the AVX2 instruction set

thanks to a late 2022 update. This means you no longer need "unofficial fixes" or emulators like Intel SDE to run the game on legacy hardware like Intel Sandy Bridge or Ivy Bridge. The Official Fix: Patch 1.3.20812

Iron Galaxy and Naughty Dog released an official patch (Version 1.3) that removes the rigid AVX2 restriction. Automatic Fallback:

If the game detects a CPU without AVX2 support, it automatically switches to a fallback executable: Uncharted 4 The Lost Legacy No Performance Loss for New CPUs:

Newer processors will still use the optimized AVX2 code path. Stability:

This official update is significantly more stable than early workarounds, which often caused severe lag or crashes. How to Apply the Fix Update Your Game: Ensure your game is updated to at least version or higher via Epic Games Store Verify Files:

If the game still won't launch, right-click the game in your library, go to Properties > Installed Files , and click Verify integrity of game files Manual Launch (Optional):

If the launcher fails to detect your CPU correctly, you can try launching the non-AVX executable directly from the game's installation folder: Legacy Support Performance

While the game will now launch on older CPUs (like the i7-2600K or i7-3770), keep the following in mind: Performance Goals: Minimum requirements target 720p at 30 FPS on Medium settings. Shader Compilation:

Older CPUs may take much longer to compile shaders on the first launch. Bottlenecks:

Even without the AVX2 restriction, your CPU may still be a bottleneck, potentially causing frame drops in heavy action sequences.

For the best experience, ensure your GPU drivers are updated to the latest version (Nvidia 526.98 or higher recommended) to avoid persistent timeouts. is now officially supported?

In November 2022, the developers of UNCHARTED: Legacy of Thieves Collection

released an official update (Patch 1.3) specifically to address the AVX2 instruction set requirement

, which previously prevented players with older CPUs from launching the game. Detailed Feature: "Legacy CPU Fallback Support"

This feature allows the game to remain accessible to players with hardware that does not support the AVX2 instruction set, such as Intel Sandy Bridge (i7-2600K) or Ivy Bridge (i7-3770K) processors. Automated Hardware Detection

: Upon startup, the game's launcher scans the user's processor for AVX2 support. Fallback Executables

: If the system lacks AVX2, the game automatically redirects the launch to a specialized "Legacy" executable: Uncharted 4: A Thief's End Uncharted: The Lost Legacy Instruction Emulation/Rerouting

: These fallback executables use standard instruction sets or original AVX paths to perform the floating-point computations that were previously locked to AVX2. Preserved High-End Performance

: Users with modern CPUs (4th Gen Intel/AMD Ryzen and newer) continue to use the standard AVX2-enabled executable, ensuring they benefit from the faster instruction sets without any performance penalty from the legacy support. Impact and Limitations AVX2 fixed on old CPUs :: UNCHARTED - Steam Community Some custom Wine builds (like Wine-tkg ) include

To resolve the AVX2 requirement in Uncharted: Legacy of Thieves Collection (which includes Uncharted 4), the most reliable solution is to update the game to Patch 3 (v1.3) or later. This official update was specifically released to introduce AVX2 support and allow the game to run on older CPUs that lack this instruction set. Official Fix: Patch 1.3 Update

If you are playing on an older processor (like Intel 3rd Gen or older), simply ensure your game client is up to date.

Patch 3 (v1.3): This update added the necessary compatibility for CPUs without AVX2.

Performance: After the update, players on "legacy" processors have reported the game running at stable framerates (e.g., 40–60 FPS depending on the GPU), whereas it previously wouldn't launch at all. Alternative Workarounds (If Patching Isn't Possible)

If you cannot update to the latest official version, community members have previously used these manual methods:

Community Fix Files: Some users have shared custom file sets (often DLLs) that bypass the AVX2 check. These are typically pasted directly into the game's root directory.

Intel SDE Emulator: This tool can emulate AVX2 instructions on older hardware.

How to use: Extract the Intel SDE Emulator, create a shortcut of sde.exe, and modify its target properties to point to your game's executable (e.g., sde.exe -hsw -- U4.exe).

Warning: This method often results in extremely poor performance (7–15 FPS) and frequent crashes.

For a visual walkthrough on applying the official AVX2 compatibility update:

Intel Software Development Emulator (SDE): Before the official patch, players used the Intel SDE to emulate AVX2 instructions. While this allowed the game to open, it often resulted in extremely poor performance (single-digit FPS) because software emulation is much slower than hardware-level execution.

Community Patches: Various forums like Reddit and Steam Community hosted custom .dll fixes or modified executables shortly after launch. Most of these are now obsolete thanks to the official update. Minimum System Requirements

Even with the AVX2 fix, ensure your hardware meets the other minimum requirements to avoid crashes: AVX2 fixed on old CPUs :: UNCHARTED - Steam Community

If you give us a patch or a fix I will buy this game from 4 steam accounts because I love uncharted so come on remove Avx2 please. Steam Community