Wireless Performance – Lab Test – ASUS USB-N66

ASUS USB-N66 Dual Band Wireless-N900

The ASUS USB-N66 Wireless-N900 USB adapter is a strange looking bird indeed.   The USB-N66 is a 3×3:3 802.11 a/b/g/n adapter that operates at from 2.4 Ghz to 5.8 Ghz and claims up to 450 Mbps speeds.  The “Patented orthogonal antenna” gives the adapter the appearance of a small pyramid or space ship, and the blue glow lights certainly add to that impression.  While the design is certainly stylish and would look great hooked up to a PC and sitting on a desk, I worry about how easy it would be to transport the adapter without damaging it or something else in your laptop bag if you’re taking it mobile.  While the adapter seems sturdy, there’s no carry case included and its shape might be an issue.

The adapter can also be switched into “AP” mode and function as an access point to let other devices connect to it and share the Internet connection.  One feature that piqued my attention was a little switch on the back of the adapter labeled “STD” and “HI” which allows you to tweak the power output of the antenna from “Standard Power” to “High Power” mode that is supposed to increase the output power by 3x and coverage up to 150%. 

We’ll test the adapter in both the Standard and High power configurations to see if the switch really does have any impact on performance.

The ping tests for the USB-N66 showed nearly identical results on both Standard and High Power settings.  The 5 Ghz spectrum in both cases showed great ping time results while the 2.4 Ghz spectrum showed a small increase in average pingtime and a large increase in maximum pingtime results.

In download tests at Standard Power levels on the USB-N66 the ASUS RT-N66U beats out the Apple Airport in every test at both spectrum ranges.  Switching the USB-N66 over to High Power added a little wrinkle to the mix with the ASUS RT-N66U still beating the Apple Airport except in burst speed tests where the Airport beat out the ASUS router by 5.1 Mbps at 5 Ghz and 4.9 Mbps at 2.4 Ghz.  Again, we don’t really see the benefit of the “High Power” setting on the adapter and except a few of the maximum speed tests, the “Standard Power” setting performed better.

At both Standard and High Power ratings the USB-N66 had similar speeds in the 5 Ghz range throughout the upload tests and the Apple Airport taking a small lead.  At 2.4 Ghz we see the opposite with the ASUS RT-N66U getting better Average, Maximum and Minimum upload speeds than the Apple Airport.  The interesting thing to note is that we actually see  better results with the USB-N66 set to “Standard Power” as opposed to “High Power” across just about every test.  Perhaps the “High Power” isn’t the best setting to use when within a few feet of the router.

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