ASUS RT-AC88U Dual-Band Gigabit Router: features, specs and who it suits

The ASUS RT-AC88U is a dual-band 802.11ac Wi-Fi router with gigabit Ethernet, finished in black and red. ASUS describes it as built for low-latency online gaming, smooth 4K UHD video playback and fast file sharing. It sits between your modem and your devices, creating the home network that phones, laptops, consoles and TVs connect to.

What "up to 3167 Mbps" means

ASUS rates the router at speeds up to 3167 Mbps. That figure is a combined theoretical total across both radio bands, added together from the maximum rates each band can reach under ideal conditions. No single device will see that number. A phone or laptop connects on one band at a time, and real speeds depend on the device's own Wi-Fi hardware, distance, walls and interference. The figure is most useful for comparing routers of the same generation rather than predicting what you will get.

Dual-band explained

Dual-band means the router broadcasts on two frequencies, 2.4 GHz and 5 GHz. The 2.4 GHz band reaches farther and passes through walls more easily, but is slower and often crowded. The 5 GHz band is typically faster at shorter range. Many devices can be split between them, with older or distant gadgets on 2.4 GHz and streaming or gaming devices on 5 GHz.

802.11ac and gigabit Ethernet

802.11ac, now often called Wi-Fi 5, is an earlier generation than Wi-Fi 6 and Wi-Fi 7. It remains widely supported by phones, laptops and TVs, and devices of any age can usually still connect. The listing also names gigabit Ethernet, which typically means wired ports that can each carry up to 1 Gbps. Wired connections are generally the steadiest choice for a desktop PC, console or media streamer.

The 3G and 4G mention

The listing title mentions 3G and 4G. Routers with this mention typically allow a compatible USB mobile modem to be used as a backup or alternate internet source, but the listing does not describe how. Check ASUS's documentation for supported modems before relying on this.

Size and placement

The listing gives dimensions of 7.4 x 11.8 x 2.4 inches (about 19 x 30 x 6 cm) and a weight of 2.1 lb (about 1 kg). Routers generally work best in a central, raised, open spot rather than a cupboard or behind a TV, since walls and metal objects weaken the signal.

Who it suits

It suits households with a fast home internet plan that want a wired and wireless router for streaming, gaming and several connected devices. It also suits anyone replacing an older router who wants gigabit wired speeds.

What to check before you buy

• Your internet plan: the router can't exceed what your provider delivers, and you may still need a separate modem.
• Your devices: newer Wi-Fi 6 or 7 devices will connect, but at 802.11ac speeds.
• Home size: one router can leave far rooms weak, so check coverage in your layout.
• Ports: count the wired devices you want to connect against the Ethernet ports.
• Mobile modem: confirm model support if you want to use the 3G or 4G feature.
• Setup and security: follow the manual, change default passwords and keep the firmware updated.

The short version

• Dual-band 802.11ac router with gigabit Ethernet.
• Rated by ASUS at up to 3167 Mbps combined across both bands.
• Aimed at gaming, 4K streaming and file sharing.
• Real speeds depend on your devices, distance and internet plan.
• About 2.1 lb; works best placed centrally and in the open.

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