What is packet loss and why does it break games?
Who this page is for
Players who see loss symbols in game or frequent disconnects.
Plain-English definitions
- Packet loss
- Percentage of packets that fail to arrive without successful retry within the time the application can tolerate.
Home checks first
- Swap Ethernet cables and try another router port.
- Remove overloaded powerline adapters temporarily if you use them.
- Test without VPN.
Evidence for your ISP
Note dates, times, wired versus Wi-Fi, and any traceroute tools your provider accepts. Pulse helps with latency and jitter trends but is not a full loss diagnostic.
Pulse measures download speed, latency, and jitter in your browser. It does not measure upload speed. For upload, use your provider’s tests or see our upload scope guide.
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Example scenario
Loss appears only on Wi-Fi. Wired play is clean. You fix wireless rather than opening a line fault.
FAQ
Does Pulse show packet loss?
Pulse focuses on download, latency, and jitter. Use provider diagnostics or specialist tools for packet loss if needed.
Does Wi-Fi always show packet loss?
Wi-Fi can drop frames under interference. Confirm on Ethernet before assuming an ISP fault.
Should I replace cables before calling my ISP?
Swapping Ethernet cables and ports is a cheap first step that rules out local issues.
Can overheating routers cause loss?
Yes. Ensure ventilation and firmware supported by the manufacturer.
What logs help my ISP?
Date, time, wired versus Wi-Fi, game title, and whether loss appears on multiple devices.
Is mobile tethering more stable than bad Wi-Fi?
Sometimes for testing, but allowances and latency differ. Compare fairly for your tariff.
Related guides
- What ping do I need for online gaming in the UK?
- What are NAT and port forwarding on a home router?
- Should I use Wi-Fi or Ethernet for a broadband speed test?