Wi-Fi 6 vs Wi-Fi 7: does a Hong Kong office need to upgrade now?
GNS Engineering Team 3 min read
Wi-Fi 7 hardware has arrived in Hong Kong, and clients keep asking whether this is the moment to replace the office wireless network. The answer depends on which generation you run today, and on whether the problem you have is coverage or speed. This article sets out what actually changed between the two standards, then why there is no rush to move everything to Wi-Fi 7.
1. What actually changed from Wi-Fi 6 to Wi-Fi 7
Wi-Fi 6 (802.11ax, including 6E, which extends it to 6 GHz) works across 2.4 GHz and 5 GHz. Wi-Fi 7 (802.11be) spans the same three bands and improves four things: channel width doubles from 160 MHz to 320 MHz; modulation moves from 1024-QAM to 4096-QAM, worth roughly twenty per cent more throughput per stream; Multi-Link Operation (MLO) lets one client use several bands at once, cutting latency even at moderate signal; and Multi-RU with puncturing reuses a partly interfered channel instead of abandoning it whole.
2. The headline speed needs Wi-Fi 7 clients
This is the part that matters most. The numbers on a Wi-Fi 7 datasheet require a Wi-Fi 7 client, such as a phone, laptop or tablet, to be reached. Most offices today run a mix of devices bought over several years. Those devices connect to a Wi-Fi 7 access point without any trouble, but they negotiate at Wi-Fi 6 or 6E rates, with no MLO and no 320 MHz. A new access point does not make an unsupported device faster.
3. The coverage cost of 6 GHz
Higher frequencies penetrate less. 6 GHz and 320 MHz perform well in open space, but in a typical Hong Kong office with many partitions and a large floor plate, the signal falls away faster than at 5 GHz. Keep the same number of access points and coverage can actually get worse. Getting value from 6 GHz usually means re-planning access point density and placement, not just swapping the boxes.
4. The costs attached to a Wi-Fi 7 upgrade
The access point is only one link in the chain. To use Wi-Fi 7 properly, the switch and the uplink need 2.5G or better, and the 6 GHz band needs PoE+ or PoE++ power. Replace only the access point and leave the power and cabling as they are, and most of the time the experience stays at Wi-Fi 6 levels.
5. What to do at this stage
Our advice is to survey first: measure coverage, device density and interference, then decide which areas genuinely fall short. If your Wi-Fi 6 or 6E system still holds up, there is no urgent case for replacing it; the real problems are usually a few dead spots or one unusually dense corner. Where a site genuinely needs new or additional coverage, Wi-Fi 7 access points can be introduced in those areas alone, letting old and new hardware coexist until more client devices support the standard.
We build UniFi networks for offices, shops and schools across Hong Kong, covering both the Wi-Fi 6 and Wi-Fi 7 product lines. The first site survey is free, and we will tell you which areas need attention before suggesting new hardware.
Frequently asked questions
Will a Wi-Fi 7 access point support our existing Wi-Fi 6 devices?
Yes. Wi-Fi 7 is backward compatible, so older devices still connect normally, but they run at the Wi-Fi 6 or 6E rates and features they support, with no MLO and no 320 MHz.
Will a Wi-Fi 6 access point bought today be obsolete soon?
No. Wi-Fi 6 and 6E devices still dominate the market, and the Wi-Fi 6 product line will keep shipping and being supported for years. Moving to Wi-Fi 7 only where it is genuinely needed costs less than a wholesale replacement.
What else is needed besides new access points for Wi-Fi 7?
The switch and uplink generally need 2.5G or better, and the 6 GHz band needs PoE+ or PoE++ power. Without those, the access point runs at close to Wi-Fi 6 speeds.
How do we judge whether our office should upgrade?
Start with a free site survey measuring coverage, device density and interference. If the current system is still sufficient, we will recommend keeping it and addressing only the areas that fall short.
