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Use the command line to target your SDE directory, then launch the Uncharted executable through the emulator using the following syntax: sde.exe -hsw -- "C:\Path\To\Your\Uncharted4\u4.exe" Keep the command prompt open while the game runs. Performance Expectations & Troubleshooting
If your processor lacks AVX2 support, or if your AVX2 implementation is causing instability, this comprehensive guide will help you understand the problem and implement the best community-tested fixes to get the game running. Understanding the AVX2 Requirement
The culprit behind these crashes was a strict CPU instruction set requirement: .
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Running a modern, highly optimized title like Uncharted 4 on a processor lacking native AVX2 support comes with trade-offs. Shader Compilation Stalls
Uncharted 4: A Thief’s End (and The Lost Legacy ) requires a processor that supports AVX2 (Advanced Vector Extensions 2). When trying to launch the game on older but still capable CPUs (e.g., early Intel Core i5/i7 from Sandy/Ivy Bridge or some AMD Phenom/Athlon models), the game crashes immediately, often showing an error like:
Intel provides a tool called the . It is designed for developers to test new instruction sets on old hardware, but we can use it to emulate AVX2 on non-AVX2 CPUs. Use the command line to target your SDE
: 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
Before attempting workarounds, ensure your CPU actually supports AVX2.
This method incurs a performance penalty of roughly 30–40%. You will not get 60 FPS on a legacy CPU. 30–40 FPS is the target. This public link is valid for 7 days
AVX2 is a hardware feature found in modern CPUs that allows the processor to execute commands faster by handling larger chunks of data simultaneously. Uncharted 4 uses these instructions for heavy engine calculations like physics, animations, and decompression.
Removing the initial hardware "handshake" that prevents the game from launching on unsupported CPUs. Performance & Stability Playability:
Because your CPU is processing translated commands, you may experience erratic frametimes (micro-stuttering) or audio desynchronization during heavy combat scenes or dense jungle environments. To mitigate this: