Wi-Fi 7 routers are now common on store shelves, and most new flagship phones and laptops support it. But what does Wi-Fi 7 actually change, and is it worth upgrading from Wi-Fi 6? Here is a no-hype explainer.
What is Wi-Fi 7?
Wi-Fi 7 is the consumer name for IEEE 802.11be, nicknamed Extremely High Throughput. The Wi-Fi Alliance introduced its Wi-Fi CERTIFIED 7 program on January 8, 2024 (Wi-Fi Alliance). It works across the 2.4, 5 and 6 GHz bands and is backward compatible with older Wi-Fi devices.
The 3 big upgrades
1. 320 MHz channels
A wider channel is like a wider highway. Wi-Fi 7 doubles the widest channel from 160 MHz to 320 MHz, but only in the 6 GHz band and only "in countries that make the 6 GHz band available to Wi-Fi" (Wi-Fi Alliance).
2. 4K-QAM
QAM is how radio waves encode data. Wi-Fi 6 uses 1024-QAM (10 bits per symbol); Wi-Fi 7 uses 4096-QAM (12 bits per symbol), which the Wi-Fi Alliance says "achieves 20% higher transmission rates" (Wi-Fi Alliance, Qualcomm). It needs a strong, clean signal, so you'll mostly benefit close to the router.
3. Multi-Link Operation (MLO)
This is the most practical upgrade. Before Wi-Fi 7, a device talked to the router over one band at a time. With MLO, a device can use multiple bands at once, or switch instantly between them to dodge interference. Cisco calls it "a fundamental sea change in Wi-Fi." The result: more throughput, lower latency and more reliable connections in busy places like apartment buildings.
Other improvements include preamble puncturing (using the clean parts of a channel when a slice of it has interference) and multiple resource units per device for more efficient scheduling.
How fast is Wi-Fi 7, really?
On paper, each generation has made a big jump in maximum link rate:
These are theoretical maximums from the Wi-Fi generations table on Wikipedia, which compiles IEEE and Wi-Fi Alliance data. Real speeds are far lower: a phone typically has two antennas, walls cut signal, and your internet plan is usually the real bottleneck. If you pay for 500 Mbps, a Wi-Fi 7 router won't make speed tests exceed 500 Mbps; it can, however, make the connection more stable and faster inside your home network.
Should you upgrade?
Upgrade if:
- Your internet plan is around 1 Gbps or faster.
- You have several Wi-Fi 7 devices (recent flagship phones, laptops) and live somewhere crowded with networks.
- You move large files between devices at home, or use VR / cloud gaming.
Wait if:
- Your phones and laptops are Wi-Fi 5 or Wi-Fi 6. They'll connect fine, but won't use MLO or 320 MHz.
- Your current Wi-Fi 6 router already covers your home well.
- Your country doesn't allow 6 GHz Wi-Fi yet.
Tip: in larger homes, a mesh system with good placement often helps more than a faster single router.
Sources
- Wi-Fi Alliance: Wi-Fi Alliance introduces Wi-Fi CERTIFIED 7 (January 8, 2024)
- Wi-Fi Alliance: Wi-Fi (MAC/PHY) certifications
- Qualcomm: Wi-Fi 7 Reference Guide (PDF)
- Cisco: Wi-Fi 7 and the Growing Future of Wireless design guide (PDF)
- Wikipedia: Wi-Fi 7 (IEEE 802.11be)
Frequently asked questions
Is Wi-Fi 7 the same as 802.11be?
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Yes. Wi-Fi 7 is the Wi-Fi Alliance's name for IEEE 802.11be, also called Extremely High Throughput (EHT). The Wi-Fi Alliance launched its Wi-Fi CERTIFIED 7 program on January 8, 2024.
How fast is Wi-Fi 7?
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The maximum theoretical link rate is about 23 Gbit/s (23,059 Mbit/s), compared with 9,608 Mbit/s for Wi-Fi 6. Real-world speeds are much lower and depend on your devices, distance, walls and internet plan.
Will my old devices work with a Wi-Fi 7 router?
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Yes. Wi-Fi generations are backward compatible, so Wi-Fi 5 and Wi-Fi 6 devices connect normally. They just won't use Wi-Fi 7-only features like Multi-Link Operation.
Do I need 6 GHz for Wi-Fi 7?
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Not to use Wi-Fi 7, which also works on 2.4 and 5 GHz. But the headline 320 MHz channels are only available in countries that open the 6 GHz band to Wi-Fi.
