How to Reduce Input Lag

Reducing input lag shortens the delay between a mouse or keyboard action and the result appearing on screen. It comes from enabling GPU low-latency modes, raising and then correctly capping the frame rate, and removing processing steps that add delay. Input lag is the total delay across the input device, the PC, and the display, and it differs from frame rate, because a high frame rate can still feel unresponsive when latency is high. The sections below define input lag, list what causes it, then walk through the fixes in order of impact.

What Is Input Lag?

Input lag is the total delay between an action on the input device and the corresponding result appearing on screen, measured in milliseconds across the input, the PC, and the display. Input lag, also called click-to-photon latency or total system latency, sums every stage from the button press to the lit pixel. It has three contributing stages:

• Input device latency is the delay from the mouse or keyboard, lower on wired and high-polling-rate devices.
• System and render latency is the delay through the CPU, GPU, render queue, and any V-Sync buffering.
• Display latency is the delay from the monitor processing and drawing the frame, lower on high-refresh gaming displays in their low-latency mode.

Input lag differs from frame rate, since a system at 120 frames per second with V-Sync and a deep render queue can feel less responsive than one at 90 frames per second with a low-latency mode on. Competitive players aim to keep total system latency under 15 milliseconds, while under 40 milliseconds feels comfortable for most play. The full background sits in what input lag is in gaming.

What Causes Input Lag?

Input lag comes from several sources across the input device, the PC, and the display, and each has a specific fix. The cards below name each source and how to address it, in roughly the order it matters:

Targeting input lag is not the same as raising the frame rate, which is covered in the guide to increasing FPS in games. A high frame rate lowers latency but does not remove it, so the latency-specific fixes below apply on top of the frame rate work.

What Are the Steps to Reduce Input Lag?

Work through these steps in order of impact, from the GPU low-latency mode down to peripherals and processing. Each one removes a distinct source of delay, and together they cut the click-to-photon time the most.

• Enable the GPU low-latency mode. Turn on NVIDIA Reflex in the game’s settings, AMD Anti-Lag 2 in Adrenalin, or Intel XeLL on Arc. For NVIDIA games without native Reflex, set Low Latency Mode to Ultra in the Control Panel. This shortens the render queue and is the single most effective change.
• Raise the frame rate. Lower demanding settings so the GPU produces frames faster, because a higher frame rate shortens the gap between updates and lowers latency on its own. Use the FPS guide for the per-setting detail.
• Put the monitor in its low-latency mode. Use a 144 Hz or higher display, enable its Game or low-latency picture mode to disable post-processing, and connect with DisplayPort to reach the full refresh rate.
• Use wired or high-polling peripherals. Plug in a wired mouse and keyboard, or a 2.4 GHz wireless model, and set the polling rate to 1000 Hz so input reports every millisecond. Avoid Bluetooth for gaming.
• Prefer variable refresh rate over plain V-Sync. Enable G-Sync or FreeSync, cap the frame rate 3 to 5 frames below the refresh rate (for example 141 FPS on 144 Hz), and turn standard V-Sync off so adaptive sync stays in its low-latency window.

NVIDIA reports its low-latency tech cutting total system latency by a large margin, with Reflex 2 and Frame Warp reaching up to 75 percent in supported titles such as THE FINALS and VALORANT. AMD Anti-Lag 2 aligns CPU submission with the GPU schedule for a similar effect, and Intel XeLL brings the same idea to Arc, so enabling whichever matches your GPU is the highest-impact step.

Why Cap the Frame Rate Below the Refresh Rate?

A frame cap a few frames below the refresh rate keeps G-Sync or FreeSync active and avoids the V-Sync latency that triggers at the refresh ceiling. When the frame rate reaches the top of the variable-refresh range, adaptive sync hands off to V-Sync, which re-adds frame-holding delay. Holding the cap just under the ceiling keeps the display in its low-latency window.

• Enable G-Sync or FreeSync in both the monitor menu and the GPU control panel.
• Set a cap 3 to 5 frames below the refresh rate, such as 141 FPS on a 144 Hz panel or 235 FPS on a 240 Hz panel.
• Apply the cap in the GPU control panel or an in-game limiter, for example the NVIDIA Control Panel Max Frame Rate setting.
• Turn standard V-Sync off in the game, since adaptive sync plus the cap already handles tearing without the added latency.

On a standard monitor without adaptive sync, leaving V-Sync off trades a little tearing for lower latency, which suits competitive play. The display’s role in all of this is covered in high refresh rate gaming.

Do Wired Peripherals and Game Mode Still Matter?

Yes. The polling rate and Windows Game Mode set the input-device and background-processing stages of latency, and both are quick wins. A 125 Hz mouse adds up to 8 milliseconds of delay, while 1000 Hz reports every millisecond. The wired-versus-wireless gap has narrowed to under a millisecond on high-end 2.4 GHz mice, so polling rate now matters more than the cable itself.

• Set the polling rate to 1000 Hz and use a wired or 2.4 GHz connection, never Bluetooth, for gaming.
• Turn on Windows Game Mode so the OS keeps background work off the input path during play.
• Disable motion blur and post-processing in the game, which add frames of delay to the rendered image.
• Close overlays you do not need, since each one adds a compositing step.
• Use exclusive fullscreen where available to bypass the desktop compositor, though recent Windows builds narrow that gap.

These steps each remove a small, fixed amount of delay that adds up. They sit on top of the GPU and frame rate work above, and the broader Windows side is covered in the PC tutorials hub.

Common Mistakes to Avoid

Reducing input lag fails when settings conflict or the frame rate is left uncapped. The mistakes that leave input lag high are listed below:

• Leaving the frame rate uncapped with G-Sync lets it reach the refresh ceiling, which re-engages V-Sync latency.
• Running plain V-Sync alone adds the largest single source of input lag without adaptive sync to replace it.
• Confusing input lag with frame rate chases a higher frame rate while ignoring the low-latency mode that cuts delay.
• Confusing input lag with ping blames the connection for a local hardware or settings problem.
• Keeping a mouse at a low polling rate or on Bluetooth adds input-device latency a wired or 2.4 GHz 1000 Hz device removes.

A setup that still feels unresponsive despite a high frame rate usually has V-Sync latency or a missing low-latency mode rather than a frame rate problem. The frame rate side sits in the guide to increasing FPS in games.

Last Thoughts on Reducing Input Lag

Reducing input lag shortens the click-to-photon delay through an ordered set of changes: enable the GPU low-latency mode (NVIDIA Reflex, AMD Anti-Lag 2, or Intel XeLL), raise the frame rate, put the monitor in its Game or low-latency mode, use wired or high-polling peripherals, and prefer variable refresh rate over plain V-Sync. The low-latency mode is the highest-impact step, and a frame cap a few frames below the refresh rate keeps adaptive sync in its low-latency window. Input lag is local responsiveness, separate from network ping, and frame generation trades a little of it for smoother motion.

These latency settings apply on top of the frame rate work in the guide to increasing FPS in games, and the display’s part is covered in high refresh rate gaming. For the wider set of Windows and gaming walkthroughs, continue with the PC tutorials hub.

Key Takeaways:

• Enable the GPU low-latency mode, NVIDIA Reflex, AMD Anti-Lag 2, or Intel XeLL, the single most effective input-lag reduction.
• Raise the frame rate, then cap it 3 to 5 frames below the refresh rate to keep G-Sync or FreeSync in its low-latency window.
• Use a 144 Hz or higher monitor in its Game or low-latency mode, connected by DisplayPort.
• Use a wired or 2.4 GHz mouse at 1000 Hz, avoid Bluetooth, and turn on Windows Game Mode.
• Input lag is local responsiveness and is separate from network ping, which is round-trip time to a server.
• Frame generation adds a little input lag in exchange for smoother motion, so leave it off for pure responsiveness.

Frequently Asked Questions (FAQs)