Uncharted 4: A Thief’s End and The Lost Legacy finally arrived on PC via the Legacy of Thieves Collection, bringing Naughty Dog’s cinematic masterpieces to a wider audience. However, for players using older but still capable CPUs, the excitement was met with a frustrating crash-to-desktop. The culprit? The game’s requirement for the AVX2 (Advanced Vector Extensions 2) instruction set.

For a modern game like Uncharted 4 , AVX2 is used for:

Emulating instructions via software introduces a massive CPU overhead. Even if you pair your older CPU with a modern graphics card, you may experience severe stuttering and low framerates.

: In Steam, right-click the game > Properties > Installed Files > Verify integrity of game files .

If you are trying to run the game on a CPU that doesn't support the AVX2 instruction set (like older Intel Core i5/i7 "Sandy Bridge" or "Ivy Bridge" processors), the game simply won't launch. But don't worry—you don't necessarily need to buy a new PC. In this guide, we will explain why this happens and the current methods to fix the Uncharted 4 AVX2 issue.

The first challenge for many players is simply understanding what AVX2 means. It's a technical barrier that can be confusing.

(e.g., i7-2600K, i7-3770K)

Before we apply a fix, it is crucial to understand the problem.