ASUS RT-N66U – Speed Test

The ASUS RT-N66U is going for some basic speed test!

The ASUS RT-N66U Dark Knight is a Dual-band Wireless-N900 Gigabit router. It supports dual-band 5GHz and 2.4GHz with speeds up to 450Mbps concurrently. Meaning to say, you can reach up to 450Mbps on each individual radio (5GHz, 2.4GHz), that explains the Wireless-N900 portion (450Mbps + 450Mbps). Get it?

300Mbps Dual-band Wireless-N USB adaptor

I will be doing some simple layman speed test that involves copying large files wirelessly and wired. For the wireless test, I will be using a 300Mbps Dual-band Wireless-N USB adaptor – ASUS USB-N53. Being a 300Mbps USB adaptor, I will not be able to hit the full potential of the RT-N66U. But if I max out on the 300Mbps adaptor, it means that the RT-N66U can handle more right? So lets see if it maximizes the 300Mbps throughput of the ASUS USB-N53.

The equipments 

The equipments that are involved in the test are:

The tests

As I mentioned earlier, these are simple tests that involves copying of files to and fro computers to gauge the wireless and wired bandwidth. Wireless benchmarking can be tricky as wireless interference from other nearby wireless networks may jeopardize the results. The wireless client is 10 meters away from the ASUS RT-N66U.

The test involves copying of large files (300MB ~ 1000MB) to and fro the devices several times (4 each for upload and download) and getting the average speed.

Wired benchmark

For a start, I did a wired speed benchmark to make sure that there are no bottlenecks between the connected devices (IBM T43, iMac 27″ and RT-N66U). I think the wired speed looks good at 644.8Mbps upload and 623.0Mbps download.

The wired speed test yield 644.8Mbps upload and 623.0Mbps download!


Wireless-N 2.4GHz benchmark

Moved on to test the speeds on Wireless-N 2.4Ghz with 40MHz channel width. The ASUS RT-N66U achieved 86.1Mbps upload and 77Mbps download.

The RT-N66U yield 86.1Mbps upload and 77Mbps download on the 2.4GHz

Wireless-N 5.0GHz benchmark

The last test is on Wireless-N 5.0Ghz with 40MHz channel width. It clocked 162.1Mbps for upload and 92.9MBps for download.


The RT-N66U yield 162.1Mbps upload and 92.9Mbps download on the 5.0GHz


The performance of the ASUS RT-N66U is respectable, the wired LAN throughput hit an average of 634Mbps. For the wireless, it hit an average throughput of 81.5Mbps and 127.5MBps for 2.4GHz and 5.0GHz respectively. All these figures are very good results for a typical home user.

If you are looking for a great performing router, you should consider getting the ASUS RT-N66U.

4 thoughts on “ASUS RT-N66U – Speed Test

  • April 28, 2012 at 5:19 pm

    Are you working for Asus’s competition? 🙂
    Those WiFi speed are far from the truth.
    Would be nice to re-test

  • April 28, 2012 at 5:37 pm

    Hi Deepcuts,

    Well, for those who know me personally knows that I am not working for any of these routers companies.

    Next is, 2.4GHz is congested in my area (and it was highlighted in the entry) and I simply post based on what I achieved. Unless you are assuming that every one got a lab environment for their home? That will be impossible.

    In actual fact, my results for 5GHz is better than some of the reviews out there. Why am I not said to be working for ASUS instead?

    Looking at Hardwarezone’s review of RT-N66U for TCP download. For 2.4Ghz, their tests yield 64.5Mbps and 59.7Mbps for download and upload respectively (at 10M). Whereas for 5.0GHz, their tests yield 90Mbps and 81.6Mbps for download and upload respectively.

    So the test results on this page truthfully reflects the actual Wireless-N speeds of the ASUS RT-N66U for TCP downloads. You can continue to argue for the higher speeds reflected by ix Chariot but this sets of test are based on what all of us knows – downloading/uploading of files in a typical home environment.

    If I have a chance to re-test with lesser 2.4GHz interference, I will. 🙂

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