If you’ve ever felt like your mouse clicks or keyboard presses aren’t registering fast enough in games like Valorant, CS2, or Fortnite, you’re experiencing input lag. Even a few milliseconds of input lag can mean the difference between winning and losing a gunfight. In this comprehensive 2026 guide, we’ll cover every method to reduce input lag in PC games — from Windows settings tweaks to monitor and hardware optimizations.
What Is Input Lag and Why Does It Matter?
Input lag is the delay between when you press a key or move your mouse and when that action appears on screen. It is different from FPS (frames per second) or network ping, though all three affect your gaming experience. Input lag is caused by a combination of factors: your monitor’s response time, your PC’s rendering pipeline, Windows settings, and your peripherals. In competitive games like Valorant, CS2, and Apex Legends, even 10-20ms of extra input lag can hurt your reaction time significantly.
Enable NVIDIA Reflex or AMD Anti-Lag
If you have an NVIDIA GPU (RTX or GTX series), NVIDIA Reflex is one of the most powerful tools available to reduce input lag. It works by aligning the CPU and GPU workload to minimize the render queue, which directly reduces the time between your input and what you see on screen. Many games support NVIDIA Reflex natively, including Valorant, Fortnite, Apex Legends, and CS2. Simply go to your in-game settings and enable “NVIDIA Reflex Low Latency” or “NVIDIA Reflex Low Latency + Boost” mode. If you are on an AMD GPU, enable AMD Anti-Lag in the Radeon Software settings for a similar effect.
Disable V-Sync (Vertical Sync)
V-Sync forces your GPU to sync its output with your monitor’s refresh rate. While this eliminates screen tearing, it introduces significant input lag, especially when your FPS drops below the monitor’s refresh rate. For competitive gaming, always disable V-Sync in both your game settings and your GPU control panel (NVIDIA Control Panel or AMD Radeon Software). Instead, use G-Sync or FreeSync if you have a compatible monitor, as these adaptive sync technologies eliminate tearing without the input lag penalty of traditional V-Sync.
Set Your Monitor to Its Maximum Refresh Rate
Many gamers unknowingly run their monitors at 60Hz even when the display supports 144Hz, 165Hz, or 240Hz. A higher refresh rate directly reduces how long each frame stays on screen before being replaced, which translates to lower perceived input lag. To check and change your refresh rate: Right-click Desktop > Display Settings > Advanced Display Settings > Refresh Rate. Make sure you are running at the highest supported Hz. Also ensure you are using the correct cable (DisplayPort is preferred over HDMI for high refresh rates on most monitors).
Enable Game Mode and Hardware-Accelerated GPU Scheduling in Windows
Windows 10 and 11 include two gaming-specific features that can help reduce input lag: Game Mode and Hardware-Accelerated GPU Scheduling (HAGS). Game Mode prioritizes system resources (CPU and GPU) for the active game, reducing background process interference. HAGS moves GPU scheduling tasks from the CPU to the GPU itself, reducing latency in the rendering pipeline. To enable both: Go to Settings > Gaming > Game Mode (toggle On) and Settings > Display > Graphics > Default Graphics Settings (enable Hardware-Accelerated GPU Scheduling). Restart your PC after enabling HAGS for the change to take effect.
Set Your Power Plan to High Performance
Windows’ power plan directly affects how aggressively your CPU operates. The default Balanced power plan throttles CPU performance to save energy, which can add milliseconds of processing delay during gaming. Switching to High Performance or Ultimate Performance ensures your CPU runs at its maximum clock speed consistently. Go to Control Panel > Power Options and select High Performance. If you do not see Ultimate Performance, open PowerShell as Administrator and type: powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61 and press Enter. This plan is especially beneficial for competitive gamers using lower-end CPUs.
Use a Wired Mouse and Keyboard (Avoid Wireless)
Wireless peripherals have come a long way, but even the best wireless mice introduce 1-2ms of additional latency compared to their wired counterparts. Brands like Logitech G (with LIGHTSPEED) and Razer (with HyperSpeed) have nearly eliminated wireless input lag, but for the absolute lowest latency, a wired USB connection remains the gold standard. If you must use wireless peripherals, ensure you use a 2.4GHz dongle receiver and plug it directly into a USB port on your motherboard (not a USB hub). Avoid Bluetooth for gaming, as Bluetooth polling rates are too low for competitive play.
Increase Mouse Polling Rate to 1000Hz or Higher
The polling rate of your mouse determines how often it reports its position to your PC. A 125Hz polling rate means the mouse reports 125 times per second (every 8ms), while 1000Hz means 1000 times per second (every 1ms). Most gaming mice today support 1000Hz (1ms), and some newer mice from Razer, Logitech, and SteelSeries support 4000Hz or even 8000Hz polling rates. Set your mouse polling rate to at least 1000Hz in your mouse software (e.g., Logitech G HUB, Razer Synapse, or SteelSeries GG). Higher polling rates provide more consistent input data and reduce average input delay.
Close Background Apps and Disable Xbox Game Bar
Background applications consume CPU, RAM, and disk resources, which can cause your game to compete for resources and introduce frame pacing issues that feel like input lag. Before gaming, close all unnecessary apps: web browsers, Discord (use the web version or a lightweight app), streaming software like OBS (unless you are streaming), and antivirus scans. Also disable Xbox Game Bar, which runs in the background and can interfere with game performance. Go to Settings > Gaming > Xbox Game Bar and toggle it off. You can also disable it from the Apps > Installed Apps section entirely.
Optimize NVIDIA Control Panel Settings for Low Latency
The NVIDIA Control Panel has several settings that directly impact input lag. Open NVIDIA Control Panel and navigate to Manage 3D Settings. Set the following for minimum input lag: Low Latency Mode: Ultra, Power Management Mode: Prefer Maximum Performance, Texture Filtering Quality: High Performance, Vertical Sync: Off, Triple Buffering: Off. These settings tell your GPU to process frames as quickly as possible and deliver them to your monitor without any buffering delay. For AMD users, open Radeon Software > Gaming > Global Graphics and set Radeon Anti-Lag to Enabled, and AMD Fluid Motion Frames can help with perceived smoothness.
Update GPU Drivers and Use Game-Ready Drivers
Outdated GPU drivers can cause all sorts of performance issues, including increased input lag, stuttering, and FPS drops. NVIDIA releases Game Ready Drivers optimized specifically for new game releases, often including specific latency improvements. Always keep your GPU drivers up to date. For NVIDIA, use GeForce Experience or download directly from the NVIDIA website. For AMD, use AMD Software: Adrenalin Edition. However, if a recent driver update causes issues, you can roll back to the previous stable version using DDU (Display Driver Uninstaller) in Safe Mode, then install the older driver version.
Cap Your FPS Below Your Monitor’s Refresh Rate
Counterintuitively, running uncapped FPS can sometimes introduce input lag due to the GPU rendering frames that cannot be displayed and overloading its render queue. A common technique used by pro gamers is to cap FPS slightly below the monitor’s refresh rate. For example, on a 144Hz monitor, cap FPS at 138. This keeps the render queue lean without overloading the GPU. Use your game’s built-in FPS cap, NVIDIA Control Panel’s Max Frame Rate setting, or RTSS (RivaTuner Statistics Server) for precise control. This is especially effective in CPU-bound scenarios where the processor is struggling to feed frames to the GPU fast enough.
Disable Mouse Acceleration (Enhance Pointer Precision)
Mouse acceleration causes your cursor to move farther when you move your mouse faster, regardless of the actual physical distance traveled. This inconsistency makes it impossible to build consistent muscle memory and can feel like input lag because your actions do not produce predictable results. Disable it immediately: Go to Control Panel > Mouse > Pointer Options and uncheck Enhance Pointer Precision. Also check your mouse’s software settings to ensure in-mouse acceleration is disabled. Most pro FPS players run with mouse acceleration completely off to ensure 1:1 input tracking.
Use MSI Mode for USB Controller (Advanced)
Message Signaled Interrupts (MSI) mode changes how your USB controller communicates with your CPU, reducing interrupt latency. This is an advanced tweak used by many competitive gamers. You can enable MSI mode using tools like MSI Utility v3 or by manually editing the Windows Registry. Look for your USB xHCI Host Controller in Device Manager, find its registry entry, and change the MSISupported DWORD value to 1. This reduces USB input delay by a small but measurable amount, which matters in ultra-competitive scenarios. Always create a registry backup before making manual edits.
Input Lag vs Ping vs FPS: What is the Difference?
Many gamers confuse input lag with high ping or low FPS, but they are three different problems. Input lag is the local delay between your action and what you see on screen. Ping (or network latency) is the round-trip time for data between your PC and the game server — high ping means the server takes longer to process your actions. Low FPS means your GPU cannot render frames fast enough, causing choppy visuals. You can have great ping (10ms) and high FPS (200+) but still suffer from input lag if your monitor, peripherals, or system settings are suboptimal. This guide addresses input lag specifically — for ping issues, focus on optimizing your internet connection and choosing nearby game servers.
Input Lag Reduction Checklist: Quick Summary
Here is a quick checklist of all the input lag fixes covered in this guide:
- Enable NVIDIA Reflex (Low Latency + Boost) or AMD Anti-Lag in game settings
- Disable V-Sync in game and GPU control panel
- Set monitor refresh rate to maximum (144Hz / 165Hz / 240Hz)
- Enable Game Mode and Hardware-Accelerated GPU Scheduling in Windows
- Switch power plan to High Performance or Ultimate Performance
- Use a wired USB mouse and keyboard over USB 3.0 or higher
- Set mouse polling rate to 1000Hz or higher
- Close background apps and disable Xbox Game Bar
- Set NVIDIA Low Latency Mode to Ultra in Control Panel
- Keep GPU drivers up to date with latest Game Ready Drivers
- Cap FPS slightly below monitor refresh rate using RTSS or NVIDIA Frame Rate Target
- Disable Mouse Acceleration (Enhance Pointer Precision)
- Enable MSI mode for USB Host Controller (advanced users)
Frequently Asked Questions About Input Lag
Does more RAM reduce input lag?
RAM speed and capacity can indirectly affect input lag by reducing system bottlenecks. Running dual-channel RAM (two sticks instead of one) improves memory bandwidth, which helps integrated graphics and can reduce frame time variance. Faster RAM (e.g., DDR4-3200 vs DDR4-2133) also slightly improves CPU performance. However, RAM upgrades provide marginal latency improvements compared to fixing GPU settings, monitor settings, or enabling NVIDIA Reflex. If you are already on 16GB dual-channel RAM, upgrading RAM will not significantly reduce input lag.
Is 240Hz really better than 144Hz for input lag?
Yes, a 240Hz monitor reduces the time each frame is displayed on screen from ~6.9ms (144Hz) to ~4.2ms (240Hz), which directly reduces the maximum display lag. Combined with a fast response time (1ms GtG), a 240Hz monitor provides measurably lower input lag than a 144Hz monitor. However, the human perceptual benefit diminishes as refresh rates climb above 240Hz. Most casual gamers will find 144Hz sufficient, while professional and semi-professional players benefit more noticeably from 240Hz or even 360Hz monitors.
What causes input lag on a low-end PC?
On low-end PCs, input lag is usually caused by low FPS combined with a lack of technologies like NVIDIA Reflex or AMD Anti-Lag. When a weak CPU or GPU cannot maintain consistent frame times, the rendering pipeline builds up a backlog of frames, increasing the time between your input and the on-screen response. To reduce input lag on a low-end PC: lower in-game graphics settings to boost FPS, enable the power plan to High Performance, close all background apps, and reduce your resolution to maintain stable FPS above your monitor’s refresh rate.
Final Thoughts: Maximize Your Gaming Performance in 2026
Reducing input lag is one of the most impactful things you can do to improve your gaming performance and competitive edge. Unlike upgrading your GPU or buying a new monitor, most of the tweaks in this guide are completely free and can be done in under an hour. Start with the most impactful changes first: enable NVIDIA Reflex, disable V-Sync, switch to High Performance power plan, and set your monitor to its maximum refresh rate. Then work through the more advanced tweaks like NVIDIA Control Panel optimization and MSI mode.
If you found this guide helpful, check out our other optimization guides on OptiLag for game-specific FPS boost guides for Valorant, CS2, GTA 5, Apex Legends, and more. Every millisecond counts in competitive gaming — optimize your setup and dominate the leaderboard.