Input lag adds up from many small delays. Fix the biggest ones first.
Before you tweak: back up your files and create a system restore point (search "Create a restore point" in Windows). Results vary by hardware and game.
Step by step
- Turn V-Sync off in-game; it's one of the largest sources of added delay.
- Use G-Sync or FreeSync if your monitor supports it, and cap FPS about 3 below your refresh rate.
- Enable NVIDIA Reflex (On + Boost) or AMD Anti-Lag in games that support them.
- Play in exclusive fullscreen where available.
- Disable Enhance Pointer Precision in Windows mouse settings and use raw input in-game.
- Use wired peripherals for competitive play.
- Check your monitor's overdrive setting; the middle setting is often best.
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