Input Lag: The Local Chain
Input lag is the total time between a physical action (mouse click, key press, button press) and the corresponding change appearing on your display. It is the sum of every local delay in the chain:
| Stage | Typical Delay | Notes |
|---|---|---|
| Peripheral polling rate (USB) | 0–8ms | 125Hz = 8ms max; 1000Hz = 1ms max |
| Game engine input processing | 1–5ms | Varies by engine and CPU speed |
| Render pipeline (GPU) | Frame time (1/FPS) | 16.7ms at 60 FPS; 4.2ms at 240 FPS |
| Display lag | 1–80ms | Game Mode: 1–5ms; Standard TV mode: 30–80ms |
| Display pixel response time | 1–5ms | Panel-dependent; GtG spec |
Total input lag in a typical gaming setup ranges from ~5ms (240 FPS, gaming monitor, 1000Hz polling, Game Mode enabled) to 100ms+ (60 FPS, TV in standard mode, 125Hz polling). Display lag is almost always the dominant factor.
Network Lag: The Remote Round-Trip
Network lag is the round-trip time (RTT) between your device and the game server — commonly called ping. It represents: your input traveling to the server, the server processing it, and the updated game state traveling back. At 30ms ping, each action-confirmation cycle takes 30ms of network delay alone.
Network lag is affected by:
- Geographic distance to the server — light travels at ~200km/ms in fiber, setting a physical lower bound.
- Number of network hops between you and the server — each router adds ~0.1–5ms.
- ISP routing quality — some ISPs route traffic inefficiently, adding 10–30ms versus optimal paths.
- Local network — Wi-Fi adds variable latency (1–15ms); wired Ethernet is consistent.
They Are Additive and Independent
Total perceived latency = input lag + network lag. A player with 5ms input lag and 50ms ping feels 55ms of total delay. A player with 40ms input lag and 20ms ping also feels 60ms — nearly identical, despite very different hardware and network setups.
Critically: reducing network lag has zero effect on input lag, and vice versa. A gaming router that saves 5ms of ping doesn't affect your display lag. A 240Hz monitor that reduces frame time doesn't affect your ping.
Diagnosing Which Is Your Bottleneck
- High ping in-game → network lag is dominant. Fix: wired connection, closer server region, better ISP.
- Game feels sluggish even in offline mode or practice range → input lag is dominant. Fix: enable Game Mode on display, increase FPS, check display refresh rate matching FPS, upgrade polling rate.
- Shots feel delayed but ping is low → input lag, especially display lag. Enable Game Mode first.
Frequently Asked Questions
Does a gaming router reduce input lag?
No — gaming routers reduce network lag (ping) by 1–5ms via QoS prioritization. Input lag is entirely local: display lag, frame time, peripheral polling. A gaming router cannot affect any local latency source. Diagnose which is limiting you before spending on hardware.
What is the biggest source of input lag I can actually reduce?
Display lag — often 30–80ms on TVs in standard mode. Enabling Game Mode reduces this to 1–5ms on good panels. After display lag: frame rate (60 FPS adds 16.7ms per frame vs 4.2ms at 240 FPS). Peripheral polling rate (125Hz vs 1000Hz) is a 6ms difference — real but smaller than display and frame time.