ASUS RT AC66U Review | 77 Data compared

Avg. price:~£35Wi-Fi version:Wi-Fi 5 (802.11ac)Wi-Fi speed:1750 MbpsLAN port speeds:1 GbpsMesh Wi-Fi:no

ASUS RT AC66U Review: Compare 77 technical specifications and user reviews to see how this product ranks in the Routers category and whether it is worth buying.

7.6

Overall score

Score
7.6/ 10
✕
What it is
An overall evaluation of the router's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best routers on the market.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

90%

7.4

Technical Score

10%

8.9

User score

â–²Better than 71% of routers
7.4

Technical Score

Technical score
7.4/ 10
✕
What it is
An assessment of the router's technical performance, covering key areas such as Wi-Fi performance, wired connectivity, security, software features, coverage, and design.
When it matters
When you want to compare routers based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

26%

5.9

Wireless

20%

6.3

Ports

18%

10

Networking

14%

9.1

Security

12%

6.2

Hardware

10%

8.0

Management

â–²Better than 70% of routers
8.9

User score

User score
8.9/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the router.
When it matters
When you want to know how a router performs in daily use and how reliable it is for speed, coverage, and stability according to user feedback.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.4

User reviews

30%

10

Popularity

User score:
United Kingdom
amazon
4.2
(4779)
amazon
4.3
(3737)
amazon
4.0
(225)
United States
Amazon_logo.png
4.2
(3913)
Amazon_logo.png
4.1
(371)

(Reviews last updated: May 2026)

â–²Better than 88% of routers
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Best rankings

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Verdict

The ASUS RT-AC66U is a high-performance 5th generation dual-band Wi-Fi router (AC1750) that delivers concurrent data rates of up to 450Mbps on the 2.4GHz band and 1,300Mbps on the 5GHz band. Powered by a 1GHz dual-core CPU with 256MB of RAM, it features three external detachable antennas, four Gigabit LAN ports, and dual USB ports (USB 3.0 and 2.0) for printer and file sharing. Main pros include its exceptional long-range 5GHz throughput, robust ASUSWRT interface with advanced VPN and parental controls, and AiMesh support for expandable home coverage. Some cons involve its lack of MU-MIMO technology and a slightly complex initial setup for novice users.

Technical Specifications of router ASUS RT AC66U

Technical Score
Technical score
7.4/ 10
✕
What it is
An assessment of the router's technical performance, covering key areas such as Wi-Fi performance, wired connectivity, security, software features, coverage, and design.
When it matters
When you want to compare routers based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

26%

5.9

Wireless

20%

6.3

Ports

18%

10

Networking

14%

9.1

Security

12%

6.2

Hardware

10%

8.0

Management

7.4
ASUS RT AC66U has a technical score of 7.4 points, which is higher than that of 70.1% of products in this category.
User score
User score
8.9/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the router.
When it matters
When you want to know how a router performs in daily use and how reliable it is for speed, coverage, and stability according to user feedback.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.4

User reviews

30%

10

Popularity

User score:
United Kingdom
amazon
4.2
(4779)
amazon
4.3
(3737)
amazon
4.0
(225)
United States
Amazon_logo.png
4.2
(3913)
Amazon_logo.png
4.1
(371)

(Reviews last updated: May 2026)

8.9
ASUS RT AC66U has a user score of 8.87 points, which is higher than that of 88.2% of products in this category.
Popularity
Popularity
10.0/ 10
✕
What it is
An indicator based on the number of reviews received by the router.
When it matters
When you prefer to choose a router reviewed and selected by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
Popularity:
ASUS RT AC66U has a popularity score of 10 points, which is higher than that of 91.9% of products in this category.
10
ASUS RT AC66U has a popularity score of 10 points, which is higher than that of 91.9% of products in this category.
Ratio quality/price
Value for money
8.3/ 10
✕
What it is
An indicator that combines the router's overall rating with its cost.
When it matters
When you are looking for a router with a good balance between network performance, features, and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

60%

7.6

Overall score

40%

10

Price

8.3
ASUS RT AC66U has a value-for-money score of 8.3 points, which is higher than that of 75.5% of products in this category.
Brand name
Asus
Wi-Fi version
Wi-Fi 5 (802.11ac)
Wi-Fi version
Wi-Fi 5 (802.11ac)
This router uses Wi-Fi Wi-Fi 5 (802.11ac), which is more advanced than 39.5% of routers and equal to 25.3% of routers.
Wi-Fi bands
2.4 GHz + 5 GHz
Wi-Fi bands
2.4 GHz + 5 GHz
This router supports 2.4 GHz + 5 GHz Wi-Fi bands, which are more versatile than 24.8% of routers and equal to 68.1% of routers.
Wi-Fi speed
1,750 Mbps
Wi-Fi speed
1,750 Mbps
This router delivers 1,750 Mbps Wi-Fi speed, which is higher than 53.1% of routers and equal to 5% of routers.
Channel widths supported
20 MHz + 40 MHz + 80 MHz
Channel widths supported
20 MHz + 40 MHz + 80 MHz
This router supports 20 MHz + 40 MHz + 80 MHz channel width options, which is more than 40.9% of routers and the same as 31.6% of routers.
Show more
Wi-Fi security protocols
WPA2, WPA, WEP, WPS
Wi-Fi security protocols
WPA2, WPA, WEP, WPS
This router supports WPA2, WPA, WEP, WPS Wi-Fi security protocols, which are less advanced than 67.5% of routers and equal to 11.6% of routers.
DoS protection
yes
DoS protection
yes
This router includes DoS protection. 12.8% of routers include DoS protection.
SPI intrusion protection
yes
SPI intrusion protection
yes
This router includes SPI-based intrusion protection. 6.1% of routers include SPI-based intrusion protection.
MAC address filtering
yes
MAC address filtering
yes
This router supports MAC address filtering. 2.2% of routers include MAC address filtering.
URL filter
yes
URL filter
yes
This router supports URL filtering. 3.4% of routers include URL filtering.
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IPv6 support
yes
IPv6 support
yes
This router supports IPv6. 11.5% of routers are IPv6-ready.
Dynamic routing
yes
Dynamic routing
yes
This router supports dynamic routing. 47.8% of routers support dynamic routing.
Inter-VLAN routing
yes
Inter-VLAN routing
yes
This router supports inter-VLAN routing. 76.7% of routers support inter-VLAN routing.
VLAN tagging
yes
VLAN tagging
yes
This router supports VLAN tagging. 38.2% of routers include VLAN tagging.
QoS
yes
QoS
yes
This router includes QoS controls. 3.2% of routers include QoS controls.
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N. of LAN ports
4
N. of LAN ports
4
This router has 4 LAN ports, which is more than 23.7% of routers and the same as 69.2% of routers.
LAN port speeds
1 Gbps
LAN port speeds
1 Gbps
This router offers 1 Gbps on its LAN ports, which is faster than 27.1% of routers and on par with 59.9% of routers.
N. of WAN ports
1
N. of WAN ports
1
This router has 1 WAN ports, which is more than 1% of routers and the same as 90.1% of routers.
N. of USB ports
2
N. of USB ports
2
This router has 2 USB ports, which is more than 79.2% of routers and the same as 20.6% of routers.
Power over Ethernet (PoE)
no
Power over Ethernet (PoE)
no
This router does not support Power over Ethernet (PoE). 0.5% of routers can be powered over Ethernet.
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Management interface
Web UI, App
Management interface
Web UI, App
This router uses Web UI, App for management, which is more advanced than 33.4% of routers and equal to 57% of routers.
ASUS Router app
Firmware upgrade method
Web UI, App, Automatic
Firmware upgrade method
Web UI, App, Automatic
This router supports Web UI, App, Automatic firmware update methods, which are more convenient than 78.9% of routers and equal to 19.9% of routers.
Traffic monitoring
yes
Traffic monitoring
yes
This router includes traffic monitoring. 18.1% of routers include traffic monitoring.
Guest Wi-Fi network
yes
Guest Wi-Fi network
yes
This router offers a guest Wi‑Fi network. 8.6% of routers offer a guest Wi‑Fi network.
Supports up to 6 SSIDs.
Captive portal
no
Captive portal
no
This router does not offer captive portal features. 23.5% of routers offer captive portal features.
Show more
CPU clock speed
1x 0.6 GHz
CPU clock speed
1x 0.6 GHz
This router runs at 1x0.6 GHz, which is slower than 66.9% of routers and on par with 2% of routers.
RAM capacity
256 MB
RAM capacity
256 MB
This router has 256 MB of RAM, which is more than 48.7% of routers and the same as 15.4% of routers.
Internal storage
0.125 GB
Internal storage
0.125 GB
This router has 0.125 GB of internal storage, which is more than 45.1% of routers and the same as 22.8% of routers.
Hardware acceleration
yes
Hardware acceleration
yes
This router offers hardware acceleration. 31.4% of routers offer hardware acceleration.
N. of external antennas
3
N. of external antennas
3
This router has 3 external antennas, which is more than 58.4% of routers and the same as 13.3% of routers.
Show more

ASUS RT AC66U vs the average router

246810TotalWirelessSecurityNetworkingPortsManagementHardware
  • 3.1x wider wireless coverage
    Wireless coverage
    576 m²
    This router has wider wireless coverage than the average router (576 m² vs 186 m²). The average router offers wireless coverage of 186 m².
    576 m² vs 186 m²
  • Supports automatic failover
    Automatic failover
    yes
    This router offers automatic failover, while the average router does not. 24.9% of routers offer automatic failover.
  • 285,012 more NAT sessions
    NAT concurrent sessions
    300,000
    This router has more concurrent NAT sessions than the average router (300,000 vs 14,988). The average router supports 14,988 concurrent NAT sessions.
    300,000 vs 14,988
  • 1 more USB ports
    N. of USB ports
    2
    This router has more USB ports than the average router (2 vs 1). The average router has 1 USB ports.
    2 vs 1
  • Supports inter-VLAN routing
    Inter-VLAN routing
    yes
    This router supports inter-VLAN routing, while the average router does not. 23.5% of routers support inter-VLAN routing.
  • Removable antennas
    Removable antennas
    yes
    This router has removable antennas, while the average router does not. 27.4% of routers have removable antennas.
  • 10.8% higher user score
    User score
    8.9/ 10
    ✕
    What it is
    A rating that combines user reviews and the total number of reviews received by the router.
    When it matters
    When you want to know how a router performs in daily use and how reliable it is for speed, coverage, and stability according to user feedback.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    ASUS RT AC66U
    the average router
    ASUS RT AC66U has a higher user score than the average router (8.87 vs 8.000).
    8.87 vs 8
  • 52.6% more popular
    ASUS RT AC66U is more popular than the average router (9.97 vs 6.5).
    9.97 vs 6.54
  • 10.8% higher user score
    User score
    8.9/ 10
    ✕
    What it is
    A rating that combines user reviews and the total number of reviews received by the router.
    When it matters
    When you want to know how a router performs in daily use and how reliable it is for speed, coverage, and stability according to user feedback.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    ASUS RT AC66U
    the average router
    ASUS RT AC66U has a higher user score than the average router (8.87 vs 8.000).
    8.87 vs 8
  • 52.6% more popular
    ASUS RT AC66U is more popular than the average router (9.97 vs 6.5).
    9.97 vs 6.54
  • 2.57x cheaper
    ASUS RT AC66U is cheaper than the average router (£35 vs £90).
    £35 vs £90
  • 3.1x wider wireless coverage
    Wireless coverage
    576 m²
    This router has wider wireless coverage than the average router (576 m² vs 186 m²). The average router offers wireless coverage of 186 m².
    576 m² vs 186 m²
  • Supports automatic failover
    Automatic failover
    yes
    This router offers automatic failover, while the average router does not. 24.9% of routers offer automatic failover.
  • 285,012 more NAT sessions
    NAT concurrent sessions
    300,000
    This router has more concurrent NAT sessions than the average router (300,000 vs 14,988). The average router supports 14,988 concurrent NAT sessions.
    300,000 vs 14,988
  • Supports inter-VLAN routing
    Inter-VLAN routing
    yes
    This router supports inter-VLAN routing, while the average router does not. 23.5% of routers support inter-VLAN routing.
  • 1 more USB ports
    N. of USB ports
    2
    This router has more USB ports than the average router (2 vs 1). The average router has 1 USB ports.
    2 vs 1
  • Removable antennas
    Removable antennas
    yes
    This router has removable antennas, while the average router does not. 27.4% of routers have removable antennas.
  • No band steering
    Band steering
    no
    This router does not support band steering, while the average router does. 51.8% of routers support band steering.
  • Lower CPU clock speed
    CPU clock speed
    1 x 0.6 GHz
    This router has a lower CPU clock speed than the average router (1x0.6 GHz vs 2x0.5 GHz). The average router has a CPU clock speed of 2x0.5 GHz.
    1x0.6 GHz vs 2x0.5 GHz
  • 2.9 W higher power consumption
    Power consumption
    11 W
    This router uses more power than the average router (11 W vs 8.1 W). The average router uses 8.1 W power.
    11 W vs 8.1 W
  • 3 older release date
    Release date
    2012
    This router is an older model than the average router (2012 vs 2015). The average router release year is 2015.
    June 2012
    2012 vs 2015
  • No band steering
    Band steering
    no
    This router does not support band steering, while the average router does. 51.8% of routers support band steering.
  • 2.9 W higher power consumption
    Power consumption
    11 W
    This router uses more power than the average router (11 W vs 8.1 W). The average router uses 8.1 W power.
    11 W vs 8.1 W
  • Lower CPU clock speed
    CPU clock speed
    1 x 0.6 GHz
    This router has a lower CPU clock speed than the average router (1x0.6 GHz vs 2x0.5 GHz). The average router has a CPU clock speed of 2x0.5 GHz.
    1x0.6 GHz vs 2x0.5 GHz
  • 3 older release date
    Release date
    2012
    This router is an older model than the average router (2012 vs 2015). The average router release year is 2015.
    June 2012
    2012 vs 2015

Graphic comparison of ASUS RT AC66U and other routers

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Third-party reviews

(Reviews last updated: May 2026)

What customers like about ASUS RT AC66U?

  • Excellent throughput performance, particularly on the 5GHz band
  • Stylish and durable design with a non-fingerprint diamond pattern
  • Feature-rich and intuitive ASUSWRT web interface
  • Strong wireless range and signal stability
  • Support for AiMesh (specifically on B1 models) for mesh networking
  • Advanced management tools including VPN server, QoS, and parental controls
  • Detachable antennas allowing for high-gain upgrades (original model)

What customers dislike about ASUS RT AC66U?

  • High operating temperatures; the unit can get quite warm during use
  • Higher power consumption compared to older Wireless-N models
  • Average USB file transfer speeds (USB 2.0 limitation on older models)
  • Early firmware versions were reported as unstable and prone to crashing
  • Initial high price point (though now considered a budget-friendly option)
  • Non-removable antennas on the newer B1 version
  • Occasional connectivity drops reported by some long-term users

Expert reviews

In-depth analysis and verdict from leading tech publications

S
smallnetbuilder.com
Undated
Summary of the review
H
hardwarecanucks.com
03/07/2013
Summary of the review
P
pcworld.com
19/09/2012
Summary of the review
U
uk.pcmag.com
16/05/2014
Summary of the review
E
expertreviews.co.uk
03/10/2012
Summary of the review
P
pcmag.com
30/11/2012
Summary of the review
T
trustedreviews.com
31/07/2013
Summary of the review
C
cnet.com
01/08/2012
Summary of the review

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

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