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Item#: N82E16833320091

ASUS RT-N66U Dual-Band Wireless-N900 Gigabit Router, DD-WRT Open Source support, IEEE 802.11a/b/g/n, IEEE 802.3/3u/3ab

  • Up to 900Mbps Wireless Data Rates
  • 2.4 GHz and 5 GHz Concurrent Dual-Band
  • Four Gigabit Ethernet Ports
  • Download Master for Wireless Data Storage
  • Detachable High-Powered Antennas
  • Two USB Ports
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RT-N66U Dual-Band Wireless-N900 Router

Incredible Performance With Incredible Control

From the Black Diamond series that brought the world's most powerful router, the RT-N56U, the ASUS RT-N66U dual-band wireless-N900 gigabit router delivers incredible performance and coverage range. With ASUSWRT, quickly setup your network, customize user access and monitor signal strength. Following the award-winning RT-N56U, the RT-N66U increases Wi-Fi speed for both 5GHz and 2.4GHz transmission by 50% up to 900Mbps. This makes the RT-N66U ideal for bandwidth-demanding tasks such as HD video steaming, multiplayer gaming, USB hard drive file sharing and USB-connected printer sharing. Built-in Wi-Fi amplifiers make the RT-N66U the perfect wireless router for larger, multi-level homes and buildings with signal range that reaches virtually any area.

RT-N66U Whether you're a tech-savvy enthusiast or a first-time user, the RT-N66U is exceptionally easy to use with CD-free, Quick Installation Setup (QIS) that let's you plug-n-surf right out of the box and connect PCs, smartphones, tablets and other wireless devices quickly. Thanks to its refined interface tools, you get control like never before. You'll be able to monitor signal strength, set up parental settings and perform other useful functions in a robust and intuitive way.

Key Features

  • 2.4GHz and 5GHz concurrent dual-band transmissions for strong signal strength and ultra-fast connection rates up to 900Mbps
  • Gigabit Ethernet ports for the fastest, most reliable Internet performance
  • Download Master for wireless data sorage and access to router-connected USB storage devices
  • Expanded wireless coverage with detachable high-powered antennas
  • File sharing, printer sharing and 3G sharing via multi-function twin USB ports
  • IPv6-enabled for future proof web surfing compatibility
  • ASUSWRT for easy setup, signal monitoring, and network application control

Designed for Class-Leading Speed and Range

Designed with the latest in networking technology, the RT-N66U delivers exceptionally fast wired and wireless connectivity. What's more, it comes with a powerful detachable Wi-Fi antenna to further extend wireless range.

Dual-Band Connectivity for Lag-Free Entertainment

Delivering both 2.4GHz and 5GHz concurrent bands up to 450Mbps, the RT-N66U has a total speed of up to 900Mbps connectivity to provide speed with stability. Perform basic internet tasks like Web browsing and file downloading under the 2.4GHz band, while also simultaneously streaming HD content and other demanding applications smoothly on the 5GHz band.

Optimized and Reliable Wireless Coverage via Ai Radar

ASUS Ai Radar intelligently strengthens connections to wireless devices. With high-powered amplification and beam forming, it provides optimized signals in any direction with better coverage to improve data throughput.

Easy Setup Through Your Tablet, Smartphone or PC

With the RT-N66U, setup is simple. Simply power and connect the router and then open a browser on a Wi-Fi-enabled device like a laptop or tablet. You will be taken to a setup page with a prompt to enter the ID and password listed in your manual and that's it! Now, setting up your network is easier than ever.

Powerful Functions, Easy Management

With the ASUSWRT Dashboard UI you can setup, monitor and control network applications all in one intuitive area. The whole new dashboard interface let's you manage all clients and settings on a single graphical interface and provides one-click updates.

Optimize Your Network for You

Do you game a lot or spend most of your time streaming videos? Whatever your planned use is, the RT-N66U has a Quality of Service (QoS) that let's you select how much bandwidth is prioritized for virtually any task. Plus, the traffic monitor allows you to check your Web usage in a clear and graphical interface.

Two Multi-Functional Built-in USB ports

Featuring connectivity to devices, FTPs, SAMBA, UPnP AV servers and DLNA support, the RT-N66U makes sharing and networking easier with two built-in USB ports. Download HTTP, FTP, and P2P files to a router-connected USB storage device all day and without a PC. Additionally, the twin USB ports allow for networked printer and file server connections, allowing you to perform multiple tasks at once.

What's in the Box

  • RT-N66U Dual-Band Wireless-N900 Router
  • RJ-45 Cable
  • Support CD (User Manual and Utility Software)
  • Power Adapter
  • Warranty Card
  • Quick Start Guide


  • Processor: Broadcom 470 @ 600MHz
  • RAM: 256MB DDR2
  • Flash: 32MB Flash
  • WAN: 1 x Gigabit Ethernet or USB 3G/4G dongle
  • LAN: 4 x Gigabit Ethernet
  • USB: 2 x USB 2.0 ports
  • Antenna: 3 x external detachable for 2.4GHz and 5GHz
  • Dimensions: 207 x 148.8 x 35.5 (L x W x H)
  • Power Supply: AC Input: 100~240Vac/1.2A 50~60Hz
  • DC Output: 19V / 1.58A
  • Buttons: WPS Button, Reset Button, Power Button
    Wireless Features
  • Frequency: 2.4GHz and 5GHz (concurrent)
  • Data Rate: 802.11n (2.4GHz & 5GHz) up to 450Mbps; 802.11a/g up to 54Mbps; 802.11b up to 11Mbps
  • Output Power: High power: 2.4GHz and 5GHz (user adjustable); 802.11n 17~26 dBm; 802.11g 17~26 dBm; 802.11b up to 26 dBm
  • Encryption: 64/128 bit WEP, WPA-PSK/WPA2-PSK, WPA-Enterprise, WPA2-Enterprise
  • Authentication: Wi-Fi Protected Setup (WPS & PIN)
  • Network Protocol: Automatic IP, Static IP, PPPoE (MPPE support), PPTP, L2TP IPv4, IPv6
  • DHCP: Server, Client, DHCP, Client list, IP and MAC binding
  • QoS: WMM, User definable rule for IP/MAC, Port, Protocol, upload and download bandwidth management
  • Port Forwarding: Port forward, Port Trigger, UPnP, DMZ
  • NAT Pass through: IPSec, PPTP, L2TP, RTSP pass through, PPPoE relay
  • Firewall: NAT and SPI, intrusion detection, DoS protect, Port filter, MAC filter
  • Access Control: Parental controls, MAC filter, Network service filter, URL filter
  • Management: Network map, Traffic monitor, Performance tuning, Telnet server, System log
  • Operation Mode: Router Mode, AP Mode
  • Download Master: Support BT, NZB, HTTP, FTP, E2DK download; Support encryption: DHT, PEX and Magnet Link; Upload and download bandwidth control; Download scheduling
  • DLNA Server: Image: JPEG; Audio: MP3, WMA, WAV, PCM, MP4, LPCM, OGG; Video: ASF, AVI, DIVX, MP2P, MPEG, MPG, TS, VOB, WMV, MKV, MOV
  • Printer Server: Multifunctional printer support
  • File Server: Samba server & FTP server with account management
  • VPN Server: PPTP VPN server

  RT-N53 RT-N56U RT-N66U
© 2012 ASUS Computer International. All Rights Reserved. ASUS is a registered trademark of ASUSTeK Computer. All specifications are subject to change without notice and features are only in select models. Products may not be available in all markets. Brand and product names mentioned are trademarks of their respective companies.


Learn more about the ASUS RT-N66U

Quick Info


  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years

Customer Reviews of the ASUS RT-N66U

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  • Ryan F.
  • 10/17/2014 11:54:31 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsBest Router I Have Owned

Pros: This router has been nothing but awesome. It maxed out my 120MBPs internet connection without breaking a sweat and internal file transfers have been great. There's a very noticeable difference when using the 5Ghz Channel.

Cons: It locked up on me once in the second week but since then it has never happened again. A reboot fixed the issue. I really have no complaints, its doing everything I need it to and more.

Did you find this review helpful? Yes No

  • Mark H.
  • 10/13/2014 11:37:14 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsStill waiting for a working unit

Pros: none

Cons: Wifi stops working after 1 day. Have to reboot to fix. Same behavior after upgrading to latest firmware or latest TomatoUSB Shibby.

My initial negative review got a response from Asus with an offer to help. I contacted them immediately, 24 days ago. It took them 10 days to issue an RMA. I RMA'd the unit back to them same day. They've had the unit for 6 days. I still don't have a working unit.

Manufacturer Response:

Dear Valued Customer,

In regars to your RMA Please email me and place case # N141045227 in the subject line for a reference to your case. I will need your RMA number to check on its status and to see what I can do. I'm here to help you and all others with these issues, as our customer loyalty department dedicated to bringing a resolution to all issues related to our products.


ASUS Customer Loyalty

Did you find this review helpful? Yes No

  • Tucker M.
  • 10/8/2014 5:57:52 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsASUS Dark Knight

Pros: Setup was so easy and fast. It took me literally probably 5 minutes to setup, the only part that took longer was going through the house and entering in passwords on various phones, tablets, laptops and blu-ray players in the house. Sleek design, blue LED's are nice looking. I read some reviews where people said this router gets hot, after gaming for a few hours I checked it a few times and it seemed warm but not hot to me. It was on sale when I bought it and Newegg had a $30 M.I.R. with it.

Cons: I can't say I have any cons at the moment, I've only owned it and had it up and running for about 2 weeks now. If a problem occurs I will revise my review.

Other Thoughts: I bought the Dark Knight to replace my old Linksys router that I've had for like 10 years. Needless to say this has been a major upgrade. Download speeds seem to be a bit faster and range on my wireless has definitely increased dramatically. I noticed the other night that my phone was already connecting as soon as I pulled in my driveway and the router is pretty much on the other end of the house. I know how to build gaming computers but I'm not very knowledgeable about routers but I did quite a bit of research and was a little hesitant about buying an ASUS router instead of a Linksys but as of this moment I am glad I went with this ASUS.

1 out of 1 people found this review helpful. Did you? Yes No

  • Mr. T.
  • 10/2/2014 6:44:00 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

4 out of 5 eggsAsus RT-N66U

Pros: Nice router, feature rich and then some. Installed Merlin's firmware on day one and has not hiccupped once. Excellent range on both bands after antenna upgrade, see other thoughts.

Cons: 1. Does get hot as others say, I have a 120mm fan blowing across mine so heat isn't really an issue. 2. The URL filter suddenly stopped working, not sure why. Many attempts to rectify that still are unresolved. 3.Extreme 'brute-force' attacks can considerably slow your connection to a crawl and peg the CPU use at 100%. 4. I didn't buy mine from Newegg.

Other Thoughts: I bought a few 9dbi antennas and I can pick my wifi up on my phone nearly half mile away, with signal power at 80%. Overall I am happy with it. The cons combined are only worth dropping one egg in my opinion.

1 out of 1 people found this review helpful. Did you? Yes No

  • Ross W.
  • 9/25/2014 12:50:22 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsPoor 2.4 GHz 802.11g bandwidth

Pros: Multiple external antennas should provide more consistent coverage.

Cons: The 802.11g WiFi is often extremely slow!

Other Thoughts: I had an RT-N56U which I really liked, but it died from a power surge from a lightning storm. I decided to upgrade to the RT-N66U because I wanted better wired throughput and I hoped that the three external antennas would provide even better coverage throughout my house.

When I first got the RT-N66U I upgraded it to the latest firmware. What I found is that the 2.4 GHz 802.11g throughput is very erratic, even at distances of 10-20 feet. Sometimes I got 30 Mbps through it, sometimes 3 Mbps, and occasionally less than 1 Mbps--always with strong signal strength. The 5 GHz 802.11n connections don't seem to have this problem. I believe others have experienced this same issue.

I was hoping the wired performance would be better than the RT-N56U, but it is about the same--maxing out at about 70 Mbps over a PPPOE WAN connection.

The 2.4 GHz 802.11g throughput is unacceptable. I could try a replacement, but it's probably not worth the possibility of seeing the same problem again, so I think I will return it and go back to an RT-N56U or other router unless someone knows of a fix for this.

0 out of 2 people found this review helpful. Did you? Yes No

  • jean d.
  • 9/23/2014 6:27:28 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsCustomer no service

Pros: lots of features most of us don't need. looks nice.

Cons: lots of firmware updates, little unstable had to reset about twice a month and died after 6 months. called Asus's customer no service and was on hold for a little over an hour and then was hung up on. this happened twice. I give up they win!

Other Thoughts: I have been a big fan of Asus and bought all their products from the 90's untill now. This is the third time i have gotten burned buy them.

2 out of 2 people found this review helpful. Did you? Yes No

  • William K.
  • 9/21/2014 2:47:53 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks Great, excellent value

Pros: Great Range, full-featured. Can run as true AP mode and use WAN port to connect to rest of the LAN, so you still have 4 more Gig-Eth ports. Just bought my second one since on sale.

Cons: The wired Ethernet ports don't make good contact unless you fully push the cables in as deep as they can be inserted. Even with the retention clip still closed, pulling on a Ethernet cable will frequently cause connection to break. Asus needs to re-engineer the clip retention mechanical design, but I can live with it.

Other Thoughts: Don't forget to turn off UP-n-P and WPS, since those protocols have lots of security issues (not specific to this router).

1 out of 2 people found this review helpful. Did you? Yes No

  • Hector T.
  • 9/19/2014 10:41:35 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsDropping connection

Pros: ASUS product, nice 5ghz networking with 2.4ghz. All ports receiving max bandwidth and good speeds from previous Belkin router

Cons: Not nearly a month, 29 days to the full month of ownership, I've had to restart the router 3 times because it looses connection. I am not certain what the issue is and have updated to the latest firmware. I hate coming home to no internet and having to fiddle with the power down/startup procedures to get your router/modem going again. Troubleshooting by plugging directly into modem suggested router was flunky.

Other Thoughts: I'm fairly disappointing in lack of response from ASUS given I own 4 - 27" monitors (1-144mhz 3D), ROG motherboard Formula IV, GTX780 asus. Been one week and still waiting for response on what's wrong with the router. I Typically go LynkSYS but been loving ASUS lately that I thought I'd try out a router in THEIR name.

-1 egg for disconnects (inconvenience)
-1 egg for poor customer response

1 out of 1 people found this review helpful. Did you? Yes No

  • Daniel M.
  • 9/18/2014 10:27:29 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat router

Pros: fast - speed test verfied
my grandma could figure this out

Cons: runs a little hot with both bands running and being use ie: gaming on the 5g and steaming music/ videos on the 2.4g but so far everything works as advertised. A few reviews had some bad stuff about the longevity of the router, will update in 1 yr

1 out of 1 people found this review helpful. Did you? Yes No

  • Mark H.
  • 9/17/2014 1:18:16 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsWifi stops responding after 1 day

Pros: speedy when able to connect, which isn't for long.

Cons: Wifi stops working after ~1 day. I can still login via hardware, but wifi doesn't work. Have to reboot. Same behavior with vendor firmware (updated to latest) or TomatoUSB Shibby

It feels very hot, maybe overheating? I've placed it in an open area with the accompanying stand. doesn't matter.

Other Thoughts: unfortunately it did this since i bought it, but I didn't do anything about it in enough time for NewEgg's replacement warranty. Hopefully the vendor will honor their warranty.

Manufacturer Response:

Dear Valued Customer,

If you would like to discuss you issue please email me in regards to your issue and place case # N140942382 in the subject line for a reference to your case. For a speedy troubleshoot please provide the following: config file, and router system log, and the firmware version you are currently using. I'm here to help you and all others with these issues, as our customer loyalty department dedicated to bringing a resolution to all issues related to our products.


Adam J.
ASUS Customer Loyalty

2 out of 3 people found this review helpful. Did you? Yes No

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