Everyone says the cable is faster. Nobody says by how much, and on any given machine the real answer is not the one on the box. Good news: you can settle it for your own machine in a minute.
So before writing a word I read what this laptop is actually connected at, and the gap turned out to be more than ten times, not the twenty percent people expect.
The reason is not really the cable at all. It is what your Wi-Fi link quietly settled for, and you can read that number in about five seconds.
What this laptop reports right now
Ours, measured before any of the explaining below.
The card is a MediaTek Wi-Fi 6 adapter. On paper that is a modern radio with modern speeds available to it. The link it actually negotiated is 78 Mbps, with a receive rate of 39 Mbps and a signal reading of 60%.
It sits on the 2.4 GHz band, on channel 1, running 802.11n. That standard is from 2009, and it is the older band. The gigabit Ethernet port next to it reads 0 bps, and plugged in it would negotiate 1,000 Mbps and stay there.
Read your own two numbers before you believe anyone
Two commands, no installing anything, and they end the argument for your machine. `netsh wlan show interfaces` in a terminal prints your band, your channel, your radio type and your actual receive and transmit rates.
`Get-NetAdapter` in PowerShell prints the link speed of every adapter, wired and wireless, side by side. Neither command changes anything. I only ever use them to read.
The router box number is a ceiling for the whole room. Everything on it shares that. Your link rate is yours.
Why a Wi-Fi 6 card ends up running like it is 2009
The band explains nearly all of it, and the trade it makes for you is not hidden. Intel says the physics plainly on its band comparison page.
A lower frequency means "a longer wave with longer range," while a higher one "can transmit more data over shorter distances." The old band is cramped, and your link is sharing it.
Documented by Intel: the 2.4 GHz spectrum is "70 MHz wide, and devices are typically limited to three 20 MHz channels."
It is also the crowded one. Intel's wording: 2.4 GHz "has been available on the market the longest, so most legacy devices still use this frequency, generating a lot of network clutter."
Intel's own steer is not subtle: anything "that demands high levels of precision or responsiveness and faster speeds will benefit most from higher frequencies such as 5 GHz and 6 GHz."
The part that stops the cable helping you
Most articles skate over it, so read this before buying anything. Your broadband plan caps both. A gigabit cable on a 100 Mbps line gives you 100 Mbps. So did the Wi-Fi.
So for web pages and streaming, the cable often changes nothing at all. The bottleneck was never the last few metres. And it changes the shape of the connection, which matters more than the headline number for calls and games.
It changes plenty for anything inside your house. Copying files between two machines is not limited by your plan, and there the cable is the whole story.
What the cable genuinely wins, and it is not speed
Three things, and none of them show up in a speed test average. It does not drop. No renegotiating because somebody shut a door or started the microwave.
It does not share. Wi-Fi is one radio conversation split between every device in range, including your neighbors' on 2.4 GHz.
It holds its number. The 78 Mbps here is what the radio agreed at that moment, and yours moves all day. A gigabit link reads 1,000 Mbps and keeps reading it.
If a call keeps breaking up on Wi-Fi, try the cable before the router. A weak signal has its own short list of causes worth ruling out first.
Try the cheaper fix first
Before you run a cable across the hall. Get on 5 GHz if your router offers it. Over a short distance that move usually beats running a cable to your desk.
Many routers publish both bands under one name, so your laptop picks, and it can pick badly and stay there. Splitting the two bands into two names forces the choice.
Renaming a network is a settings job, not a hardware one. An extender is rarely the answer to a slow link.
Both makers say why, and it is about halving.
When the cable is the one behaving badly
Because a wired link can fail in its own quiet way. A gigabit port reporting 100 Mbps is a cable or socket problem. It is not a speed you were sold.
The number is the first thing to read, and `Get-NetAdapter` gives it to you in one line. An unplugged port reads 0 bps, which is what this laptop shows and is the correct reading for a cable that is not there.
No link at all is a different article. Whether the cable made a link is the first thing to establish.
**Status: measured 18 September 2026 on this laptop, a Home install of Windows 11 on 25H2, reading the adapter list and the live wireless link.
Intel's band comparison page supplied the channel count, the interference wording and the band guidance.
No network name, no access point address and no location is published, nothing was reconfigured, and no speed test was run against any service.**
Is an Ethernet cable faster than Wi-Fi?
On this laptop, yes, by more than ten times: a 78 Mbps wireless link against a gigabit port.
But your broadband plan caps both, so if your line is slower than either, the cable will not make web pages load faster. It makes the connection steadier.
Why is my Wi-Fi 6 laptop so slow?
Usually because the link settled on the 2.4 GHz band and an older radio standard. This machine has a Wi-Fi 6 card running 802.11n at 78 Mbps. Run netsh wlan show interfaces and read your band and radio type before blaming the card.
Does a wired connection make my internet faster?
Only if Wi-Fi was slower than your broadband plan. If your plan is 100 Mbps and your Wi-Fi link is 78 Mbps, the cable helps. If your Wi-Fi link is already above your plan, it will not, though it will be more consistent.
How do I check my Wi-Fi link speed on Windows?
Open a terminal and run netsh wlan show interfaces. It prints the band, the channel, the radio type and your live receive and transmit rates. For every adapter at once, including the Ethernet port, run Get-NetAdapter in PowerShell.
The Short Version
- Measured here: a Wi-Fi 6 card linked at 78 Mbps on 2.4 GHz using 802.11n.
- The gigabit port beside it would negotiate 1,000 Mbps and hold it.
- Run netsh wlan show interfaces to see your own band, radio type and rate.
- Intel says 2.4 GHz has about three usable channels and carries most legacy devices.
- Your broadband plan caps both, so the cable often changes nothing for web pages.
- It changes everything for copying files between machines in your own house.
- The real wins are consistency and not sharing the air with everyone else.
- Moving to 5 GHz is the cheaper fix, and usually the bigger one over short distances.
Where to Next
Read your own link rate first, because the argument is settled differently on every machine.
If you are on 2.4 GHz and 5 GHz is available, move before you buy a cable.
Check what your broadband plan actually delivers, so you know whether anything at your end can help.
And if you want the connection to stop wobbling during calls, run the cable, because steadiness is what it really sells.
If your two numbers came out in a way this does not explain, say what band and radio type you saw in the comments. That pairing usually names the cause.
Isaac Smith is the founder and editor of PC Glance, a website that covers computers, laptops, and technology. He is a tech enthusiast and a computer geek who loves to share his insights and help his readers make smart choices when buying tech gadgets or laptops. He is always curious and updated about the latest tech trends.