ASUS RT-AC3100 Wireless AC3100 Router: features, specs and who it suits

The ASUS RT-AC3100 is a dual-band Wi-Fi router based on 802.11ac, the standard also known as Wi-Fi 5. It's a home networking device that creates the wireless network and connects it to your internet service. This listing is for a renewed unit, with the model shown as RT-AC3100-cr.

What AC3100 means

The "AC3100" label is a combined figure for the router's two radio bands, 2.4GHz and 5GHz. ASUS gives a maximum throughput of 3167 Mbps. This is a theoretical total across both bands under ideal conditions, not a speed any single device will see. Real speeds depend on distance, walls, interference, the device's own Wi-Fi hardware and your internet plan.

4x4 and MU-MIMO

The router uses 802.11ac 4x4 technology, meaning four spatial streams. In general, more streams allow more data to travel at once, provided the connected device supports them; many phones and laptops use fewer streams, so they don't reach the highest figures.

MU-MIMO (multi-user, multiple-input, multiple-output) is also listed. ASUS says it lets multiple compatible clients connect at each client's own maximum speed. In everyday terms, it helps on busy networks with several devices streaming or gaming at the same time, though the benefit depends on the devices supporting it.

Gaming network access

The listing mentions built-in access to the WTFast Gamers Private Network, a service of route-optimised servers that ASUS says helps keep ping times low and stable for online games. It is a service provided with the router's software, so check the terms and what it requires from the ASUS or WTFast side.

AiProtection

ASUS says AiProtection is powered by Trend Micro and offers multistage protection, from vulnerability detection to protecting sensitive data. Features like this generally scan traffic and block known malicious sites. They supplement, and don't replace, good habits such as strong passwords and regular firmware updates.

Ports, size and renewed condition

The listing describes fast USB and WAN/LAN speeds and mentions service prioritisation, which lets the router give some traffic types, such as games or video calls, preference over others. The package measures about 15.9 x 10.2 x 5.1 inches (40 x 26 x 13 cm) and weighs 7 lb (3.2 kg).

"Renewed" generally means the unit has been used or refurbished before. Check the condition, accessories and warranty terms that come with it, and reset the router to factory settings before setup.

Who it suits

It suits larger homes with many connected devices, households with gamers or streamers, and anyone who wants a capable Wi-Fi 5 router. Those wanting the newest standard may look at Wi-Fi 6 or Wi-Fi 7 models instead.

What to check before you buy

• Internet plan: confirm your modem works with a separate router and that the plan speed matches your needs.
• Devices: check which of your devices support 802.11ac and how many streams.
• Coverage: a single router's range depends on your building; large or multi-storey homes may need extra access points.
• Condition and warranty: for a renewed unit, check what's included and the terms.
• Updates: update the firmware and change the default password when you set it up.
• Space: it is a sizeable router with external antennas, so allow room.

The short version

• A dual-band 802.11ac (Wi-Fi 5) router rated at AC3100, with 3167 Mbps maximum combined throughput.
• 4x4 technology with MU-MIMO.
• Built-in access to the WTFast gaming network and AiProtection by Trend Micro.
• Renewed unit; check condition and warranty.

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