The official natively resolves the "Unsupported CPU" crash by removing the strict Advanced Vector Extensions 2 (AVX2) hardware requirement from UNCHARTED: Legacy of Thieves Collection . Developed by Naughty Dog and ported by Iron Galaxy, the game initially required modern instruction sets to run. This hardware barrier locked out millions of players using older, yet highly capable, Intel Ivy Bridge, Sandy Bridge, and AMD FX-series processors. This guide explains how the new fallback system works, how to deploy it, and what performance to expect. Understanding the AVX2 Problem
If your processor does not support AVX2, the game automatically switches to an optimized fallback executable: u4-l.exe for Uncharted 4 or tll-l.exe for The Lost Legacy. uncharted 4 avx2 fix new
: The fix is included in version 1.3 and later. Steam and Epic Games Store versions should update automatically to the latest version. Unofficial & Troubleshooting Alternatives The official natively resolves the "Unsupported CPU" crash
In the "Target" field, add -hsw -- at the end, followed by the path to your u4.exe . This guide explains how the new fallback system
(e.g., Sandy Bridge and Ivy Bridge architectures like the iconic i7-2600K and i7-3770) Older AMD Processors released prior to the Zen architecture
If the chip lacks AVX2, the game dynamically routes processing to fallback executables: u4-l.exe (for Uncharted 4: A Thief's End ) or tll-l.exe (for The Lost Legacy ). Additional Fixes in the Update