January 17, 2022

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Xiaomi Mi WiFi Range Extender AC1200 Review: An Affordable, but Limited Repeater

To evaluate the performance of Xiaomi’s repeater, we reconnected the 5 GHz signal from our Netgear RAX200 router to which we connected the laptop PC with a 2.5 Gb / s socket via an adapter. To measure the speed, we transferred the 4.73GB file (disk image) from the first laptop PC to the second computer equipped with the Intel AX200 WiFi 6 chip, but to the standard desktop PC on the floor. A gigabyte GC-WBAX200 PCIe card with the Intel AX200 chip, but with an external antenna.

The router is positioned in one corner of the house, and the repeater is inserted into a socket about 15 cm from the ground, almost in the middle of the latter. We take the measurement at a distance of 1 m from the router, which provides optimal flow rates (point 1), 1 m from the repeater at the center of the house (point n ° 2), and 5 m away from the room. The repeater (point 4), which has a load-bearing wall opposite the router, is the third measurement (point 3) on a fixed system upstairs through the concrete floor, and the last measurement on the second floor, but the speed of the router above the first chamber is very low (point 5).

The 5 GHz band of the Xiaomi Mi WiFi Range Extender AC1200 offers very low speeds because at best the performance is less than 200 Mb / s. It offers almost the same performance. Netgear EX3110 The overall speed is 750 Mb / s (2.4 GHz + 5 GHz). Very complicated: despite the external antennas, the 5 GHz signal was not even picked up by our laptop at our measuring point n ° 5. Failure we had not encountered until then.

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The performance of the 2.4 GHz band is close to the performance of the 5 GHz band, which is very logical: the 5 GHz band is used to communicate with the router when the signal is back to 2.4 GHz. Therefore, in all cases, the maximum theoretical bandwidth of this repeater is 2.4 GHz, i.e. 300 MB / V. Even if the signal is taken at our point n ° 5, it is not possible. To complete our 4.73GB file transfer, it would be hard to use it for anything other than very light web browsing – forget video streaming.