Explained
What Is Input Lag and How to Reduce It on PC and Console
Input lag is the delay between pressing a button and seeing it on screen. Here’s where it comes from, how it differs from response time and how to reduce it.
Input lag (or input delay) is the time between clicking, pressing a key or moving a stick and seeing the result on screen. In a slow game it barely matters; in a competitive shooter, a few milliseconds make the difference. That’s why shooter streamers like Shroud, Tfue or Summit1g choose very specific mice and monitors.
Where the delay comes from
What you feel is total system latency, the sum of several stages:
- Peripheral: the mouse or keyboard detects the action and sends it to the PC (polling rate matters).
- Game and CPU: the game processes the input and prepares the frame.
- GPU: renders the frame. When it’s maxed out, frames queue up and latency rises.
- Display: the monitor processes and shows the image.
Input lag is not response time
They get mixed up a lot. Response time (1 ms, 0.03 ms on OLED…) measures how long a pixel takes to change color: it affects motion blur. Monitor input lag measures how long the display takes to start showing the image it receives. A monitor can have good response time and mediocre input lag, especially with image processing on.
How to reduce input lag
- High refresh rate monitor. At 240 Hz each refresh lasts about 4 ms, versus almost 17 ms at 60 Hz.
- Game mode on TVs. It disables most processing and removes the most lag on a TV.
- NVIDIA Reflex or AMD Anti-Lag in supported games: they stop the GPU from queuing frames.
- Don’t max out your GPU. Capping FPS slightly below the maximum often lowers latency.
- Sync: avoid classic V-Sync; use G-Sync/FreeSync with an FPS cap (see what is G-Sync).
- High polling-rate peripherals (1,000 Hz or more). Current wireless gaming mice like the Logitech G Pro X Superlight perform like wired ones.
- Exclusive full screen instead of borderless window, if the game allows it.
Input lag vs ping
Ping is network latency to the server. It adds on top in online games but is fixed elsewhere: Ethernet, a nearby server and a stable connection.
To see which monitors the pros pick, check what monitor streamers use.
FAQ
Are input lag and response time the same?
No. Input lag is how long it takes for what you do to appear on screen. Response time is how long a pixel takes to change color, which affects motion clarity.
How much input lag is acceptable?
On a gaming monitor, display lag is usually under 10 ms at its maximum refresh rate. TVs outside game mode can exceed 50–100 ms, which you will notice.
Does Wi-Fi increase input lag?
Wi-Fi increases network latency (ping), which is different. Cheap wireless peripherals can add delay, but current gaming models match wired ones.
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Sources
- NVIDIA Reflex: what system latency is
- RTINGS: how monitor input lag is measured
- Blur Busters: G-SYNC 101 latency tests
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