Uncharted 4 Avx2 Fix Link

: 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.

: Shaders will take significantly longer to compile on the first launch. Tips to Boost FPS on Older CPUs

: Lowering the NPC and crowd settings reduces the physics calculations the CPU has to manage.

When Uncharted: Legacy of Thieves Collection (which includes Uncharted 4: A Thief's End ) launched on PC, many players with older processors ran into a major roadblock: the game completely refused to launch, crashing straight to the desktop. This issue happens because the game engine strictly requires the Advanced Vector Extensions 2 (AVX2) instruction set. uncharted 4 avx2 fix

If the screen goes black after the Naughty Dog logo, delete the psolib folder in Documents\Uncharted Legacy of Thieves Collection\ . The fix sometimes corrupts the shader cache. Let the game rebuild it.

Verify game files and reinstall

AVX2 (Advanced Vector Extensions 2) is a CPU instruction set used to accelerate mathematical calculations. When Uncharted 4 launched on PC, the game was coded to require these instructions. This meant that even powerful older CPUs—like the legendary or certain Xeon and AMD FX processors—could not launch the game because they lacked AVX2 support. The Official Fix: Patch 1.3 : The patch introduced a clever fix: if

The Uncharted 4 AVX2 Fix: How to Run Legacy of Thieves on Older CPUs

| Issue | Possible Solution | | :--- | :--- | | Game crashes immediately after launch | 1. using Display Driver Uninstaller (DDU) to perform a clean installation. 2. Run the game as an administrator . 3. Press ALT+Enter multiple times during launch to force windowed mode. | | Game crashes during shader compilation | Wait for the full shader compilation process to complete . On older CPUs, this can take up to 40 GB of disk space and may take 10–15 minutes. Do not interrupt it. | | Poor performance (low FPS, stuttering) | 1. Ensure you are using the -l version of the executable (e.g., u4-l.exe ), as it is optimized for non-AVX2 CPUs. 2. Lower graphics settings , particularly shadows and draw distance, which are CPU-intensive. 3. Close background applications to free up CPU resources. | | Game does not appear in Task Manager | This often indicates that the AVX2 check failed before the process could be created. Try launching the -l executable directly instead of using the Steam/Epic launcher. | | "Launcher_CPUFeatureAVX2NotPresent_Message" error | Your CPU does not support AVX2. You must use one of the fixes listed above. Simply restarting your PC or running as administrator will not resolve this. |

AVX2 was introduced with the 4th Generation (Haswell) architecture in 2013. Older chips like the legendary Intel Core i7-2600K (Sandy Bridge) or i7-3770K (Ivy Bridge) lack AVX2. When Uncharted: Legacy of Thieves Collection (which includes

Depending on your technical comfort level, there are three ways to bypass the AVX2 lockout. These are unofficial workarounds. Proceed at your own risk.

Because Naughty Dog's engine ties certain audio processing modules to vector extensions, you may notice delayed sound effects or stuttering dialogue during cutscenes.

When the Uncharted: Legacy of Thieves Collection launched on PC in October 2022, many players with older but still capable CPUs—such as the 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.

Following heavy community feedback, Iron Galaxy and Naughty Dog released official post-launch patches that removed the hard AVX2 requirement for the executable. For the majority of users, simply updating the game to the latest build via your game launcher will resolve the crash naturally without needing manual file replacements. Step 2: Install the Community AVX2 Fix (Intel SDE)

When Uncharted: Legacy of Thieves Collection arrived on PC, many players with older processors encountered an immediate, frustrating hurdle: a crash-on-launch or an error message stating that the CPU does not support AVX2 (Advanced Vector Extensions 2).