GTA 4 - Vulkan API DXVK - Maxed Out - i7 10700k - RTX 2080 Ti - 21:9 UltraWide 3440x1440
1) Download DXVK - https://github.com/doitsujin/dxvk/releases (Move d3d9.dll and dxgi.dll to main GTA 4 folder)
2) create a commandline.txt file in main GTA 4 folder and enter these commands:
-width 3440 ( Enter your own resolution and hz)
-height 1440
-refreshrate 144
-norestrictions
-fullscreen
-lodScale 1.0f
-HDStreamingInFlight
-tessellation 3
-vehicleLodBias 1.0f
-lodScale 1.0f
-shaderQuality 2
-grassQuality 5
-postFX 3
-reflectionQuality 3
-fogVolumes
-SSA
-multiSample 16
-txaa
-shadowQuality 3
-SSAO 2
All command lines https://www.reddit.com/r/GrandTheftAutoV_PC/comments/32lumm/grand_theft_auto_v_pc_custom_command_lines/
Optimization Guide:
https://ant-sh.blogspot.com/2020/07/gta-4-stutter-choppiness-fix.html#_Toc45820771
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