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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 2017. It is powered by MediaTek MT7620A @ 580 MHz chipset, 64 MB of RAM, and 16 MB of flash memory.

Want to know if this Asus router stands out? Stay tuned!

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
    • Links
  • 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. If you noticed any mistakes or missing details about the Asus RT-AC51U+, please let us know.

Asus RT-AC51U+ / RT-AC51UP

The RT-AC51U+ is a versatile router that offers more than basic functionality. It provides a fast network for homes and offices. Asus has a history of introducing innovative features and technologies into its products.

Asus RT-AC51U+ specifications

BrandAsus
NameRT-AC51U+
TypeRT-AC51UP
Rating
Rated 3/5 based on 1554 user votes.
Launch2017

Body

Dimensions189 x 129 x 36 mm
Weight270 g

If you plan to move a lot and need to take your router with you, the size is important. Otherwise, the size isn't too crucial. If you buy a router online or have it shipped, the weight may affect the total cost.

System

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

The MediaTek MT7620A @ 580 MHz CPU provides processing power. Some router features and software work best when they have enough RAM to help them.

Asus RT-AC51U+ (RT-AC51UP) / 1

Network

ProtocolsIPv4
IPv6
LAN ports4 x 10/100/1000 Mbps
WAN ports1 x 10/100/1000 Mbps
Mobile networkyes, with USB dongle
VPN supportPPTP
L2TP
OpenVPN

The router also supports IPv6. This allows you to use the latest Internet Protocol. If you have a 1 Gbps or faster internet plan, you need gigabit Ethernet ports. The RT-AC51U+ ensures that you can use fast internet from your ISP fully. You can connect the 3G/4G USB dongle to the USB port on the RT-AC51U+ router. OpenVPN uses a certificate-based authentication system. This enhances security and provides a stronger method of verification.

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 RT-AC51U+ is compatible with 2.4 GHz Wi-Fi networks. Using the 5 GHz band can move some devices from the crowded 2.4 GHz band. The AC Wi-Fi router is backward compatible with older Wi-Fi devices that support 802.11a/b/g/n standards. The introduction of WPA2 (Wi-Fi Protected Access 2) improved upon WEP. It provides stronger security. The Wi-Fi Protected Setup (WPS) lets you join a safe wireless network with the push of a button or a simple PIN entry.

Asus RT-AC51U+ (RT-AC51UP) / 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). By connecting a USB printer to the RT-AC51U+ router, you can make it accessible to all devices on your network. This router has a USB file server. It lets you connect external storage devices to your network.

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.

Official sitehttps://www.asus.com/

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. Just remember, this is just what I think, and you might see things differently.

Pros

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

Cons

  • insufficient flash
  • missing Wi-Fi 6 support
  • incompatible with WPA3

Asus RT-AC51U+ photos

Asus RT-AC51U+ / RT-AC51UP photo
Asus RT-AC51U+ / RT-AC51UP photo
Asus RT-AC51U+ / RT-AC51UP photo
Asus RT-AC51U+ / RT-AC51UP

Asus RT-AC51U+ comparisons

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Updated: May 25, 2024

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.