Review New In the Charts: ASUS RT-AX58U

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Product Review


Mr. Easy
Staff member
ASUS' RT-AX58U AX3000 Dual Band WiFi 6 Router has been tested and added to SmallNetBuilder's Wi-Fi Router Charts. Also known as the RT-AX3000 and RT-AX82U, its Broadcom-based design is spec'd for two streams on 2.4 and 5 GHz. However, since the 5 GHz radio is Broadcom's BCM43684 four stream an/ac/ax radio, it appears it support four-stream receive under the hood.

The router didn't do that well in our throughput vs. attenuation tests, however, due to sustained throughput dips on both bands' downlink tests that were observed on multiple test runs. Check the Wi-Fi Router Charts for more details.

ASUS RT-AX58U vs. ASUS RT-AX86U 5 GHz RvR downlink
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Asuswrt-Merlin dev
I've always wondered... I've seen a few of your charts that showed a performance dip at a certain attenuation level, followed by an increase at a few dB later. It's pretty significant in this particular case, in the 12-16 dB range. What would explain the fact that it's not linear as intuitively I would expect it to be, and that it can actually go up and down like that? Bad output level tuning in the calibration tables used by the router?


Part of the Furniture
The graph pretty much clearly shows the reasons why I, 1) sold the RT-AX58U, and 2) feel the need to test at 'normal' distances (as 3 to 5 meters) rather than within the same room from pretty much any router newer than the RT-AC68U.


Mr. Easy
Staff member
Is there a basic explanation of what these charts mean physicallly
You can use the throughput vs. attenuation plots to get a basic idea of relative performance.

In the plot below, the X axis can be thought of as distance and the Y axis as throughput/speed. The ASUS is likely to provide more usable signal over distance then the NETGEAR because it maintains higher throughput as signal level drops (attenuation increases).

Actual distance or area covered depends on many factors, most notably walls and other obstructions.

This article provides a good explanation of free-space, i.e. no obstacles loss.
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