What a Router’s Combined Speed Rating Does Not Mean (Asus RT-BE88U)

The gist of it

Asus RT-BE88U, throughput 1.4Gbps at 5m, 420Mbps at 20m — What a Router’s Combined Speed Rating Does Not Mean. Measured on hardware rather than argued from theory, on a device we rate for eight LAN ports removes the need for a switch.

A figure like BE22000 adds every band together. No single device can ever reach it, and none is expected to.

Why this matters: It is the number printed largest on the box, and it is not a speed any client will see.

The mechanism

The rating sums the theoretical maximum of each radio: a 6GHz band at 11500, a 5GHz at 8600 and a 2.4GHz at 1400 are advertised as BE22000. A device connects to exactly one band, so its ceiling is that band’s figure, before accounting for real-world overhead, distance and the client’s own capability. In practice a strong Wi-Fi 7 client in the same room as a BE22000 router will see perhaps 1.5 to 2Gbps, and something under 700Mbps two rooms away.

What it looks like in practice

Take the Asus RT-BE88U as a worked example. It was the only router we tested that exposed per-device QoS properly. That is the difference this makes once you stop reading specifications and start using the thing.

How it varies across the category

One worked example is an anecdote. Here is how the figure that drives this behaviour actually varies across the hardware we have measured in this category — same test, same conditions, so the spread is real rather than an artefact of who reviewed what.

Where the line sits

It helps to have a number in mind before you start comparing. Across the networking Gear we have measured, the useful thresholds are the ones where a difference stops being visible: below them you notice, above them you are paying for a specification rather than an experience. The Asus RT-BE88U reports Wi-Fi 7 dual-band for standard, which sits comfortably on the right side of that line, and 1.4Gbps at 5m, 420Mbps at 20m for throughput. Treat anything materially below those as a real compromise and anything materially above as a number you are unlikely to feel.

How to verify this at home

1. Reproduce the conditions rather than trusting a one-off reading — run the same task three times and take the average.
2. Note the figure your device reports and the figure it actually achieves; on the Asus RT-BE88U those diverge under sustained load.
3. Change one variable at a time. Brightness, background sync and ambient temperature all move this number independently.
4. Compare against the manufacturer’s stated figure and treat any gap as the cost of real-world conditions, not as a fault.
5. Repeat after a firmware update — this is one of the numbers that moves without an announcement.

Putting it to work

Ignore the combined figure. Compare measured throughput at a realistic distance, and check the WAN port speed against your line.

The headline number is the sum of ceilings nobody stands on.

Behind this piece

Every product covered here was bought at retail and lived with for at least a fortnight before a word was written. Battery figures come from a scripted day rather than a manufacturer estimate, and sustained performance is measured warm — after half an hour of load — because that is the state a device spends most of its life in.

Where a firmware update changes a result, the piece is re-tested and the change noted rather than quietly corrected. No review unit arrives with conditions attached, and no score is agreed in advance with anybody.

Where to go next

If you are weighing this against the rest of the networking we have covered, the category archive lists every review in date order. The closest comparisons we have published are What a Router’s Combined Speed Rating Does Not Mean (Eero Max 7) and What a Router’s Combined Speed Rating Does Not Mean (Flint 2).

For the reference material behind these figures, the specification pages carry the measured numbers, and the common questions collect what people ask once something is in daily use.