Why Do I Have Lag Spikes?

What a lag spike means

A lag spike is a sudden jump in delay. Your connection may be fine most of the time, then briefly freeze, stutter or become unresponsive. In games this can look like rubber-banding, delayed hits or characters jumping position.

Lag spikes are usually linked to unstable latency, jitter or packet loss rather than headline download speed.

Common causes of lag spikes

• Wi‑Fi interference: weak signal, crowded channels or devices moving between bands.
• Upload congestion: cloud backups, CCTV, video calls or file uploads filling the upstream connection.
• Router load: too many active devices or an older router struggling under traffic.
• Peak-time congestion: latency rising in the evening when local usage is high.
• Packet loss: missing data causing games and calls to stutter.

How to stop lag spikes

Use Ethernet for gaming where possible, pause background traffic, close cloud-sync apps and test again. If lag spikes disappear on Ethernet, focus on Wi‑Fi placement, mesh coverage and interference. If they continue on Ethernet, test at different times and contact your provider if the issue is consistent.

Look at jitter, not just ping

Average ping can hide the problem. A game may show an acceptable average, while short bursts of high jitter create visible lag. When testing, compare both ping and jitter and repeat the test in the room where the issue happens.

Quick diagnosis checklist

• Run a LinkSpeed test and note download speed, upload speed, ping and jitter.
• Repeat the test on Ethernet where possible to remove Wi‑Fi from the results.
• Pause downloads, cloud backups, game updates and streaming on other devices.
• Test again at a different time of day to check whether congestion is involved.
• Keep screenshots or notes if you need to report the issue to your provider.

FAQs

Related LinkSpeed pages