Arc Raiders is an extraction shooter built on Unreal Engine 5. UE5 titles have specific Windows configuration needs due to Nanite geometry and Lumen lighting overhead.
UE5 and CPU scheduling
UE5 uses a task graph system that spawns many short-lived threads. The Windows scheduler needs to handle rapid thread creation efficiently. Short scheduling quanta (Win32PrioritySeparation=38) helps here.
Process priority
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ArcRaiders.exe\PerfOptions
CpuPriorityClass = 3
IoPriority = 3
GpuPriority = 8
Shader compilation stutter
UE5 games compile shaders at runtime on first run. This causes severe stutter until the cache is built. After first play session the stutter disappears. Nothing to fix here — it's normal.
Ensure your shader cache location has fast disk access and isn't on a network drive.
DirectX 12 and flip model
Arc Raiders defaults to DX12. With DX12 the flip model presentation is used by default — ensure MPO is disabled to prevent frame pacing issues:
HKCU\Software\Microsoft\Windows\DWM
OverlayTestMode = 5
VRAM management
UE5 is aggressive with VRAM allocation. If you have 8GB or less, ensure no other applications are holding VRAM. Close browser tabs with hardware acceleration, Discord overlay, any capture software.
Full system optimization at https://terweb.lt/
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