High Ping and Jitter? How to Reduce Lag Spikes

Lag spikes come from latency that jumps around, not from slow download speed. Measure ping and jitter first, then remove the causes one by one.

Common causes

• Wi-Fi interference or a weak signal
• Other devices downloading or streaming
• Bufferbloat on the router
• A distant or overloaded server

Step-by-step fix

1. Measure a baseline — Run the ping test for 100 pings and note average ping, jitter and loss.
2. Use a cable — Connect by Ethernet. If jitter drops, Wi-Fi is the cause.
3. Move closer or change band — Use 5 GHz or 6 GHz near the router, and 2.4 GHz only for range. Avoid walls and microwaves.
4. Stop background traffic — Pause cloud backups, game updates, torrents and 4K streams on all devices.
5. Enable QoS or SQM — Many routers have Quality of Service or Smart Queue Management settings that prevent bufferbloat.
6. Restart and update the router — Reboot the router and modem and install firmware updates.

Tip: Run the ping test while someone else streams video. If ping jumps by more than 30 ms, enable QoS on your router.

Still not fixed?

If jitter and loss stay high on a cable with nothing else running, contact your internet provider with your test results.