Check logs and Windows Event Viewer
The game will now launch. It may take longer to load, but it should bypass the AVX2 crash. uncharted 4 avx2 fix
, developer Iron Galaxy released a significant update (Version 1.3) that officially added support for older CPUs without AVX2. Fallback Executables Check logs and Windows Event Viewer The game
Scan the game memory for AVX2 opcodes (e.g., VZEROUPPER , VEXTRACTF128 ). EBX bit 5)
The fix installs a global hook on __cpuid / __cpuidex . When the game queries AVX2 support (leaf 7, EBX bit 5), the hook returns 0 , forcing the engine into a legacy SIMD path. Additionally, the hook masks OSXSAVE bits to prevent AVX2 activation.
: In Steam, right-click the game > Properties > Installed Files > Verify integrity of game files .