RouterChart.com

Asus RT-AC51U router review

300 + 433 Mbps
IEEE 802.11a/b/g/n/ac
MediaTek MT7620A @ 580 MHz
64 MB / 16 MB

Asus introduced the RT-AC51U router in 2014. It is powered by MediaTek MT7620A @ 580 MHz chipset, 64 MB of RAM, and 16 MB of flash memory.

Want to know if the RT-AC51U is a game-changer? Read on!

Table of Contents

  • Asus RT-AC51U specifications
    • Body, dimensions, weight
    • System, chipset, RAM, flash, power supply
    • Network, protocols, WAN and LAN ports
    • Wireless, antennas, speed, security
    • Connectivity
    • Administration, user interface, login information
  • Verdict, Pros and Cons
  • Photos
  • Comparisons

Our personal experiences and opinions form the basis of this article. We aimed to share insights on a topic, and we hoped others would find it useful and inspirational. The specs below rely on official manufacturer data, but we also consider user reviews. If you noticed any mistakes or missing details about the Asus RT-AC51U, please let us know. Furthermore, we strive to deliver a thorough and precise overview.

Asus RT-AC51U / RT-AC51U

The RT-AC51U is a good choice for users. It is reliable and feature-rich, and it supports the latest Wi-Fi 6 technology. The USB connectors on the router add versatility to your network. They enable file sharing, printer sharing, and other USB functions. Asus incorporates energy-efficient features in their products, promoting sustainability and reducing power consumption.

Asus RT-AC51U specifications

BrandAsus
NameRT-AC51U
TypeRT-AC51U
Rating
Rated 3/5 based on 1550 user votes.
Launch2014

Body

Dimensions189 x 129 x 36 mm
Weight270 g

If you have limited space, like in a small apartment or office, the dimensions can determine if it can fit there. If you purchase a router online or have it shipped, the weight may affect the overall cost.

System

ChipsetMediaTek MT7620A @ 580 MHz
RAM64 MB
Flash16 MB
OSAsus
Power supply12 V / 1 A

The MediaTek MT7620A @ 580 MHz CPU is key. It, along with factors like RAM and firmware, decides how well the router works. Some router features and software need a certain amount of RAM. They need it to work well. More storage space comes from a larger flash memory. It can accommodate future firmware upgrades. Upgrading router firmware has become simple and user-friendly. The Asus provides the right power supply. It is 12 V / 1 A, this matches the router's voltage needs.

Asus RT-AC51U (RT-AC51U) / 1

Network

ProtocolsIPv4
IPv6
LAN ports4 x 10/100 Mbps
WAN ports1 x 10/100 Mbps
Mobile networkyes, with USB dongle
VPN supportPPTP
L2TP
OpenVPN

The RT-AC51U router has built-in security features. They protect your network and devices. Most networking equipment, like routers and switches, supports IPv4. The RT-AC51U router is also compatible with IPv6. IPv6 has a much bigger address space. It also offers many enhancements and improvements over IPv4. Wired connections may bottleneck due to the limits of Fast Ethernet ports. Connect the 3G/4G USB dongle to the RT-AC51U router. Then, you can share the internet connection. You can share it with many devices on your local network.

OpenVPN uses a certificate-based authentication system. This enhances security and provides a stronger method of identity verification. PPTP uses the Password Authentication Protocol (PAP). It also uses the Challenge Handshake Authentication Protocol (CHAP) for user authentication.

Wireless

Antennas2 x 5 dBi
RP-SMA
2.4 GHzyes
5 GHzyes
60 GHzno
StandardsIEEE 802.11a/b/g/n/ac
ClassAC750
Speed300 + 433 Mbps
Transmit power18.5 dBm
SecurityWEP
WPA
WPA2
WPS
Guest networkyes

The 2 x 5 dBi, RP-SMA antennas allow sending and getting many data streams at once. This boosts overall throughput and improves Wi-Fi performance. Many IoT devices, smart home devices, and older Wi-Fi devices mainly use the 2.4 GHz band. This router operates on both the 2.4GHz and 5GHz frequency bands. It lets you connect devices to the best band for their needs. The AC Wi-Fi router is backward compatible with older Wi-Fi devices that support 802.11a/b/g/n standards.

Real-world RT-AC51U router speeds are lower than its theoretical maximum speed. WEP was the first Wi-Fi security protocol. But it is now seen as weak and easy to hack. The introduction of WPA2 (Wi-Fi Protected Access 2) improved upon WEP. It provides stronger security. WPS (Wi-Fi Protected Setup) provides an easy method. It connects devices to a Wi-Fi network.

Asus RT-AC51U (RT-AC51U) / 2

Connectivity

USB ports1 x USB 2.0
Print serveryes
File serveryes

The USB 2 port has a maximum theoretical data transfer rate of 480 megabits per second (Mbps). A USB print server adds print functionality. You can manage settings, watch queues, and control access from one place. The RT-AC51U router lets you schedule backups. You can back up to the connected USB storage device.

Administration

Default IP192.168.1.1
Default usernameadmin
Default passwordadmin

If you can't log in to your Asus router's setup panel, try resetting it. A reset can help you troubleshoot. It is highly recommended to change the default password of your RT-AC51U router. Do this after the initial setup.

Pros and Cons

Every router, including this Asus one, has its good sides and not-so-good sides. Let's take a closer look at both to get a full understanding of what this router can do. We'll talk about what it does well and also where it could use some improvements. Just remember, this is just what I think, and you might see things differently.

Pros

  • lightweight
  • sufficient memory
  • IPv6 capable
  • 3/4G USB modem capable
  • supports OpenVPN
  • works on 5 GHz band
  • WPS friendly
  • USB 2 compatible
  • printserver functionality
  • fileserver operation

Cons

  • insufficient flash
  • lack of Gigabit LAN
  • Non-gigabit WAN port
  • missing Wi-Fi 6 support
  • incompatible with WPA3

Asus RT-AC51U photos

Asus RT-AC51U / RT-AC51U photo
Asus RT-AC51U / RT-AC51U photo
Asus RT-AC51U / RT-AC51U photo
Asus RT-AC51U / RT-AC51U

Asus RT-AC51U comparisons

We've noticed that many of our visitors like to compare the Asus RT-AC51U router with these popular models.

Asus RT-N15U (RT-N15U) Asus RT-N15U Asus WL-600G (WL-600G) Asus WL-600G Asus RT-N54U (RT-N54U) Asus RT-N54U Asus RT-AC87U (RT-AC87U) Asus RT-AC87U

If there’s information about the Asus RT-AC51U that you would like to see on this site, then write to us.

Robert Miller
For over 15 years, I've immersed myself in the world of networking devices as a tech aficionado. I've dedicated myself to thoroughly testing and analyzing routers and other networking gear. I aim to provide thorough reviews. They will give you the knowledge needed to improve your network.
RouterChart.com / Routers / Asus / Asus RT-AC51U (2014)