Wired vs wireless, which actually gives you lower latency?

[TheRock96]

A properly configured wired ethernet connection almost always beats wireless on raw latency, and the reason comes down to how each technology fundamentally handles data transmission. Wired connections send data directly through a dedicated physical cable with essentially no competing traffic to negotiate around, while wireless has to share the actual radio spectrum with every other device on the network and deal with interference from walls, other electronics, and neighboring networks.

A good wired connection typically sees latency in the low single digit milliseconds. While even a strong modern wireless connection usually adds somewhere between 5 and 20 additional milliseconds on top of that, and that gap can widen significantly under real world conditions, more connected devices competing for bandwidth, physical obstructions between you and the router, or interference from a neighbor's own network operating on a similar frequency.

Modern wireless standards have genuinely narrowed this gap considerably compared to older generations though. Newer protocols specifically include features designed to reduce latency and better handle multiple simultaneous devices, and for most everyday tasks, browsing, streaming video, casual gaming, the actual difference is genuinely imperceptible to a typical user.

Where the gap actually matters in practice is specifically competitive online gaming and any task genuinely sensitive to split second timing. Since even 10 to 15 extra milliseconds can be the real difference between landing a shot and missing one in a fast paced competitive title, which is exactly why serious competitive gamers still consistently recommend a wired connection despite wireless technology having improved dramatically.

So the honest short answer is wired wins on raw latency in essentially every real world scenario. The actual size of that gap and whether it genuinely matters to you depends entirely on what you are actually doing with the connection

[FrostCandle]

Mildly disagree that that the gap is always imperceptible outside gaming. Video calls on a congested wireless network still show real noticeable lag for me compared to the exact same call over a wired connection

[AntMan]

Extra thought, router placement matters enormously for wireless latency specifically.

Moved mine to a more central open location in my apartment and saw a bigger improvement than any hardware upgrade gave me

[Cass93]

The 10 to 15 millisecond number for competitive gaming tracks with what pro players and coaches recommend. That specific margin really can be the difference in a fast reaction based game