4x4 AP can only utilize 2x2 streams, combined bandwith never exceeds that of one 2x2 client
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Hello,
I dont think that problem is specific to this particular AP, it looks like every WiFi6 AP does have that problem.
In theory a 4x4 MU-MIMO accesspoint should be able to deliever 4 spatial streams with a comined bandwith of for example 2.4 GBit for 80MHz channels.
If connecting one 2x2 device, the total bandwith is around 800 Mbit/s. So if connecting another 2x2 device, we should see figures in the area of 1.6 GBit/s (when 2.5GE is connected of course, but even with GigE you should get _at least_ 950-970 Mbit combined).
But in reality, this is not working. But where is the culprit? Why is 4x4 not working? And what about 8x8 configurations? Will they ever serve more then 2x2 bandwidth?
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Aaah, yes 660hd I have one myself and on a good day it do 1gb, and i have only 1gb on switch port.
but i have heard that this device not deliver what it should. but for me it work pretty good. mybee im lucky i dont know.
i use firmware version 1.1.1 Build 20220118 Rel. 60852 pretty old an i hope for a update soon.
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1gig with 80MHz channel and two 2x2 devices or one device and 160Mhz? Or one device 4x4 (which is super rare) on 80mhz?
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2x2 80Mhz ch48
100-105 MB/s on max speed when copying a file,
42 client most of it IoT device exept streeaming from two chromecast device.
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you should test it out with iperf. 2x 1Gb server and 2x wireless devices capable of 2x2 80mhz. you run the test and check the maximum performance from it.
and the specs, it may not be 100% real.
yes. 4x4 antenna, does not mean the chipset can handle all that data. or it is simply tells you it has 4x4 antenna for multiple devices.
it can throttle. like intel advertises its max boost clock. you don't really get to boost clock all the time.
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I did exactly that, 2x 1Gbe server and 2 devices that can handle 2x2 MIMO (Samsung S22 Ultra + iPad Pro M1).
TPLink advertises 4x4 MU-MIMO, so BY DEFINITION (or to be more precise by standard) it has to support multiple streams to multiple devices and therefore the bandwidth has to increase with more than one device.
I even tried to connect 2.5 GBE ethernet switch so really no limit from ethernet this time.
No change at all.
Therefore the EAP is not working and not offering what is advertised.
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this is not 1Gbe but more like 850Mbit, which is exactly 80MHz 2x2 practical performance (with Intel AX chipset Im able to get up to 950MBit on 2x2). So no 4x4 in your case either.
Is anyone from TPLink engineering team here and can shed some light on the malefunction of the AP? Why is TP-Link advertising 4x4 MU-MIMO but clearly not delivering.
Because as of now, the 660HD and the 670 are not worth the uplift. They are not better, even worse, compared to the 653 and other smaller APs.
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with your duo testing device, what are the results?
you have verified the link speed is max, speed test can max out. then you run the test to get a large file from the 2x 1Gb server.
supposedly, you should see a split 1.2Gbps speed on each.
but you see 1.2Gb divided 2 equal 600Mbps on each?
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yes, when two 2x2 devices are transferring data, each device is getting less then 600Mbps, and the total is even less then one 2x2 device.
So one 2x2 device achieves around 950 Mbps at best (averaging 850)
Two 2x2 devices total average at 750 Mbps (combined, each one is 350 - 400).
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