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Asus RT-AC87U AC2400 review

Gordon Kelly



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Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400
  • Asus RT-AC87U AC2400


Our Score:



  • Peak wireless speeds break new ground
  • Attractive new design
  • Simple setup


  • 5GHz falters at range
  • USB 3.0 port badly positioned
  • Expensive

Key Features

  • 802.11a/b/g/n/ac WiFi
  • Quantenna QSR1000 'AC2400' chipset
  • 4x Gigabit LAN, 1x Gigabit WAN
  • WPS, WPA/WPA2 security
  • Manufacturer: Asus
  • Review Price: £219.99

What is the Asus RT-AC87U?

The Asus RT-AC87U is the first of a new grade of 802.11ac wireless routers. Having just gotten used to brilliant AC1900-class models like Asus’ own RT-AC68U, the Linksys EA6900 and our current favourite, the D-Link DIR-880L, now we brace ourselves for the onslaught of ‘AC2400’ rated products and Asus is leading the charge.

So do AC2400 routers represent a new level of wireless performance or just marketing hyperbole and a higher price tag?

SEE ALSO: Best Routers Roundup

Asus RT-AC87U – Design

Important new routers tend to mean new designs - the Netgear Nighthawk R7000, D-Link DIR-880L and many others have followed this trend - and Asus is following the trend with the RT-AC87U.

One of the last bastions of upright router design, Asus has finally ditched the form factor with the AC87U and it lies flat with monstrous antennas that give the boats attached to the DIR-880L a run for their money. The switch pays off because the AC87U looks great. It takes inspiration from the R7000, but adds more striking angles that are part supercar/part Transformer.

A downside is the activity lights are bright and prominently positioned, but they can be switched off if they frustrate. Furthermore Asus has nailed the build quality and the AC87U is rock solid while its matt finish resists dust and fingerprints. It does run a little warm underneath, but nothing that will damage any delicate surfaces and if you’re still worried it is wall mountable.

Asus RT-AC87U - Features

The obvious talking point is the AC87U’s AC2400 rating and it comes courtesy of a brand new chipset: the Quantenna QSR1000. What it brings to the table are 4x4 streams (hence the four sizeable antennas), the first time 5GHz WiFi has stepped up from 3x3 antenna arrays.

The good news is this bumps the theoretical bandwidth for 802.11ac to 1733Mbps and in combination with 600Mbps 802.11n 2.4GHz (just like the AC1900 routers) this adds up to 2333Mbps which Asus has taken liberties in rounding up to ‘AC2400’.

The downside is to get these new speeds you will need a 4x4 compatible receiver and currently the only model - Asus’ own PCE-AC87 (an upgrade to the PCE-AC68) - has yet to hit the market. Meanwhile most smartphones (1x1), tablets and laptops (2x2) don’t even reach a 3x3 array. This is an extreme router requiring an extreme receiver.

SEE ALSO: Best Powerline Adapters Roundup

The good news is the AC87U also works in a bridge mode (how we tested) and inevitably it ticks all the other boxes for a top of the line router. These include Gigabit WAN and four Gigabit LAN (though surely a fifth or sixth port would’ve been a fine differentiator), IPv6 compatibility and WPS and WPA/WPA2 security.

There are also USB 2.0 and USB 3.0 ports, though the USB 3.0 port is front mounted and I’m not a big fan of the flip down front which hides it or the messy look wiring creates if you have a device permanently connected to it.

Ending on a positive: Asus has teamed up with Trend Micro to offer 'AiProtection', which blocks malicious addresses and intrusions, triggers alerts if infected devices are connected to your network and beefs up parental controls.

Asus RT-AC87U – Setup

Despite the complexity of the new technology within the AC87U it remains just as easy to setup as any other Asus router and that means even the most technophobic of users shouldn’t worry.

Plug in the router, let it boot, connect to one of its open WiFi signals (5GHz and 2.4GHz are marked) and it opens a browser tab and begins the setup wizard. This includes setting your own SSIDs, WiFi passwords and admin password and username. It’s fast, simple and you’ll be up and running in five minutes.

The ageing Asus grey and black UI could use a less moody spruce up, but it is still intuitive to navigate and as it isn’t broken the company is clearly in no rush to fix it.


October 6, 2014, 6:35 pm

My word, this is like Gillette coming out with a five blade razor. I await the next crop of four antenna routers and the inevitable five antenna one ;). Also it looks like the law of diminishing returns is kicking in with the move from AC1900 to AC2400.


October 7, 2014, 11:35 am

Did you test power consumption? I read in another review that it uses more than 50W, which is a huge amount for an 'always on' device like a router. My two-disc NAS only uses 30W when active!


October 7, 2014, 12:45 pm

Why bother reviewing this when they have released a 3200 model (it has 6 antenna)


October 8, 2014, 10:54 am

Amazing- it's 2014 and security is barely mentioned.

Reviewers need to start assessing whether vendors offer security updates on a regular basis - most don't. The security of the router in its default state should also be assessed.

Seriously guys.


October 8, 2014, 10:55 am

That sounds very unlikely on a 24-7 basis - it might hit that if you have several Wi-Fi connections active.

Most routers should idle at 10-15 watts.


October 8, 2014, 11:13 am

According to this website, it's 45W, not 50W. Sill, that's pretty high.



October 8, 2014, 11:22 am

Also discussed in a Podcast:


Azim Esmail

October 19, 2014, 10:01 pm

That's Netgear, not ASUS, and it's gotten worse reviews than this and the new Linksys WRT900AC.

Robbie Rob

November 20, 2014, 11:48 pm

The reviewer has on the cons of the router: "5GHz falters at range"

This 1st of all has nothing to do with the router and everything to do with the 5Ghz band. You'll get this on any router over 5Ghz. This happens to also be a PLUS because 2.4 Ghz goes very far and most people don't realize because it does there is often interference from neighbors or devices using the same band range. This is part of the reason 5Ghz can hit higher peak speeds. As there is less interference so the negotiated speed will be higher between router and devices connected. 5ghz channels being further apart is nice too..

Funny enough the best speeds are on 5ghz and yet my PS4 doesnt support it! My friend has an Xbox One & PS4 and says the Xbox is better for online and supports 5ghz.. I might be getting a XB1 now too

On my PC & on my smart phone over 5Ghz I can hit much better speeds with slightly better pings then I can on my 2.4 ...

Overall good reviews though..

Istiaque Choudhury

December 6, 2016, 9:11 pm

As someone who had a N66U, going to AC87U was a big bump in range but also an increase in the speeds as the same "indicated strength signal" on the mobile devices

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