Asus RT-AX88U
Wi-Fi 6 finally hits the mainstream, and it’s as fantastic as it is expensive
SCORE
PRICE £250 (£300 inc VAT) from pcpro.link/300ax
The new wireless standard is here: 802.11ax, also known as Wi-Fi 6, is designed to deliver much faster connections than 802.11ac, and to keep things moving more smoothly when lots of devices want to connect at once.
The RT-AX88U has the familiar look of a high-end Asus router and offers all the features you’d expect. What it doesn’t offer is the 11Gbits/sec of triple-band Wi-Fi 6 routers, including Asus’ own bigger, jazzier ROG Rapture GT-AX11000 ( pcpro.
link/300rog). Instead, it makes do with a mere 6Gbits/sec, with Asus saving pennies by including two radios rather than three. This is less of a concern than it was with 802.11ac: the new standard uses a technical trick called “orthogonal frequencydivision multiple access” to achieve better performance when multiple devices are connected, so there’s less to be gained by spreading the load across three radios.
Super speed
The major defining feature of 802.11ax is that it encodes more information into each packet of transmitted data than previous wireless standards. So, even though the RT-AX88U’s twin radios use the same frequencies as an 802.11ac router, they deliver significantly higher bandwidth: the 2.4GHz radio can handle speeds of up to 1,148Mbits/sec and the 5GHz radio is rated at a superfast 4,804Mbits/sec.
On top of this, the standard uses new techniques to reduce the impact of interference, so less of that bandwidth is lost to environmental factors. Asus claims that, as a result of these improvements, the AX88U delivers 2.3 times the performance of a comparable 802.11ac router.
To find out how true that is, I tested the AX88U by installing the router with default settings then walking around my home with a Dell Latitude 5490 laptop (equipped with a 2x2 MIMO Intel AX200 802.11ax adapter and connected on the 5GHz band) and copying large files to and from a NAS appliance connected directly to the router via Ethernet.
In the top table opposite, you can see the speeds I measured in
“Your eyes do not deceive you. The RT-AX88U roughly doubled download speeds compared to the Nighthawk Pro Gaming XR700”
various rooms, in megabytes per second, stacked up against the fastest 802.11ac router I’ve tested, the £440 Netgear Nighthawk Pro Gaming XR700 ( pcpro.link/300night).
Your eyes do not deceive you. The RT-AX88U roughly doubled my download speeds compared to the XR700, and write speeds in many areas of the house were more than six times as fast. To reiterate, these numbers are in megabytes per second, so even in the bathroom, at the opposite end of the house to the router, the connection is strong enough to max out a 250Mbits/ sec fibre internet connection. Considering the number of walls and appliances in the way, not to mention the plumbing, that’s amazing.
It will be a few years before all our clients support Wi-Fi 6 – right now, the most popular device that supports it is probably the Samsung Galaxy S10 – so for the time being the RT-AX88U’s 802.11ac performance remains very relevant as well. To measure this, I
repeated the test using my Microsoft Surface Laptop, with its 2x2 MIMO Marvell Avastar-AC adapter. See the results in the middle table above.
In this mode, the RT-AX88U can’t quite keep up with the fastest 802.11ac router there is but these are still very respectable speeds. There’s more than enough bandwidth to watch Netflix in 4K on my laptop while I’m out on the rear terrace and, frankly, it’s hard to see what more you could ask for. And since the RT-AX88U supports 4x4 MU-MIMO, the connection shouldn’t stutter if other systems in the house demand network access at the same time, though a tri-band model would handle more clients at once.
Finally, 2.4GHz performance. This radio band can better penetrate physical obstacles, but it has a lower data rate and a greater susceptibility to interference, so you’re almost always better off with a 5GHz connection. Still, see the Asus’ speeds over the 2.4GHz band, in both 802.11ac and 802.11ax modes, in the bottom table above.
As you can see, 802.11ax once again provides a decent speed boost – but it’s hard to imagine a situation where you would have the option of using 802.11ax but not on the 5GHz band.
Better by design
The RT-AX88U is tastefully designed, with few of the trappings of Asus’ more ostentatious gaming routers. Only the gold-lined cutouts on the four antennae hint that there’s anything special about this router.
Functionally, though, it’s pretty upmarket. There are eight Gigabit Ethernet ports and, while the AX88U doesn’t have a 2.5GbE socket like the ROG Rapture, the first two ports support 802.3ad link aggregation. You can also combine LAN port 4 with the WAN port to support a 2Gbits/sec internet connection – not that many of us will take advantage of that.
There’s also a USB-A 3.1 socket at the rear, and another tucked away behind a flap at the front. Plug in a flash drive or hard disk and the RT-AX88U can serve as a basic NAS, with support for multiple user accounts and macOS Time Machine backups. The second port can be used to share a USB printer or plug in a 4G modem to serve as failover if your main internet connection goes down.
Other highlights include a built-in VPN server (supporting PPTP, OpenVPN and IPSec), to let you securely access your home network over an untrusted internet connection; integration with Alexa and IFTTT to automate basic tasks; and Asus’ nifty AiMesh system, which lets you extend your Wi-Fi coverage by linking two or more Asus routers together into a mesh network. If you’re using an older Asus router, this could give it a useful second life once you upgrade to the RT-AX88U.
You also get a single-device account on the WTFast VPN, which is designed to minimise lag in online games, plus the AiProtection system powered by Trend Micro, which provides intrusionprotection and antivirus features. Both services are free forever.
If I’ve one grumble, it’s that the web-based management interface is exactly the same as on every Asus router since 2012 and, frankly, it’s a bit of a mess. A slick router such as this deserves a front end to match. Still, after the initial setup you’ll rarely need to deal with it.
Time to buy
I’m sold. I knew that 802.11ax would mean faster Wi-Fi, but the reality is better than I’d dared hope for. Not only is it massively faster than 802.11ac at short range, it maintains that huge advantage through obstacles and over long distances. Hitherto, I’ve been using a Netgear Orbi mesh system to ensure I get decent coverage in my home but with Wi-Fi 6, it’s simply not necessary. Perhaps it’s an exaggeration to say that 802.11ax changes everything, but it overturns the established wisdom of what you can expect from a wireless connection. Of course, the RT-AX88U isn’t the only way to get 802.11ax. Other products are trickling onto the market, and by Christmas every major router brand will doubtless have multiple Wi-Fi 6 offerings, including some at much lower price points. But, if you want to make the leap right now, you won’t regret it: this superb router is fast, functional and futureproof.
SPECIFICATIONS
Dual-band 802.11ax 2.4GHz/5GHz Wi-Fi router 1,1148Mbits/sec on 2.4GHz 4,804Mbits/sec on 5GHz quad-core 1.8GHz processor 4 x external antennae 8 x Gigabit Ethernet 2 x USB-A 3.1 300 x 188 x 61mm (WDH) 1kg 1yr warranty
“I’m sold. I knew that 802.11ax would mean faster Wi-Fi, but the reality is better than I’d dared hope for”