Linksys EA6900 - Slow wifi speed

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Uner
DD-WRT Novice


Joined: 25 Aug 2023
Posts: 16
PostPosted: Fri Aug 25, 2023 22:56    Post subject: Linksys EA6900 - Slow wifi speed Reply with quote
Hi,
I have Linksys EA6900 v1.1, DD-WRT v3.0-r53221 std (07/08/23).
This router supports:
    MIMO status 3x3:3
    802.11ac up to 1300 Mbps
    N-QAM up to 600 Mbps


However I'm only getting max of 433Mbps rate on 802.11ac 5Ghz even when i'm 3 feet away from it.
The device that is connected to the wifi supports more than 1300Mbps.

BTW when no user is connected the rate that is specified on the web gui Status -> Wireless is 1300Mbps
I've enabled
Explicit Beamforming
Implicit Beamforming

Channel width = 80Mhz (max for this router)
Extension Channel = upper lower
Channel = 157 (5.785Mhz) (I tried other channels without success)

Does anyone else have this problem?
Can it be fixed?

Thanks.
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MDA400
DD-WRT User


Joined: 10 Jan 2015
Posts: 270
Location: Minnesota
PostPosted: Sat Aug 26, 2023 0:28    Post subject: Re: Linksys EA6900 - Slow wifi speed Reply with quote
Uner wrote:
Hi,
I have Linksys EA6900 v1.1, DD-WRT v3.0-r53221 std (07/08/23).
This router supports:
    MIMO status 3x3:3
    802.11ac up to 1300 Mbps
    N-QAM up to 600 Mbps


However I'm only getting max of 433Mbps rate on 802.11ac 5Ghz even when i'm 3 feet away from it.
The device that is connected to the wifi supports more than 1300Mbps.

BTW when no user is connected the rate that is specified on the web gui Status -> Wireless is 1300Mbps
I've enabled
Explicit Beamforming
Implicit Beamforming

Channel width = 80Mhz (max for this router)
Extension Channel = upper lower
Channel = 157 (5.785Mhz) (I tried other channels without success)

Does anyone else have this problem?
Can it be fixed?

Thanks.


What is the model of client adapter that is connecting to the router? intel AX201 for example?
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Uner
DD-WRT Novice


Joined: 25 Aug 2023
Posts: 16
PostPosted: Sat Aug 26, 2023 1:28    Post subject: Reply with quote
Qualcomm Snapdragon 720G
Integrated 802.11ax-ready, 802.11ac Wave 2, 802.11a/b/g, 802.11n
Tri-band Wi-Fi: 2.4 GHz, 5 GHz, 20/40/80 MHz, 2x2 (2-stream) MIMO, 256 QAM, Dual-band simultaneous (DBS)[/b]
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 13291
Location: Netherlands
PostPosted: Sat Aug 26, 2023 12:06    Post subject: Reply with quote
Best BCM wifi settings is a sticky in this forum.

Just set Channel 36.

My EA6900 has a PHY rate of 866 Mb/s paired to a Samsung S20 under ideal circumstance, e.g. clean spectrum, client beside the router.

Actual throughput is of course way less
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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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MDA400
DD-WRT User


Joined: 10 Jan 2015
Posts: 270
Location: Minnesota
PostPosted: Sun Aug 27, 2023 13:52    Post subject: Reply with quote
Uner wrote:
Qualcomm Snapdragon 720G
Integrated 802.11ax-ready, 802.11ac Wave 2, 802.11a/b/g, 802.11n
Tri-band Wi-Fi: 2.4 GHz, 5 GHz, 20/40/80 MHz, 2x2 (2-stream) MIMO, 256 QAM, Dual-band simultaneous (DBS)[/b]


Max link rate of the snapdragon 720g for wifi is only 867mbps.
https://www.qualcomm.com/products/mobile/snapdragon/smartphones/snapdragon-7-series-mobile-platforms/snapdragon-720g-mobile-platform

80mhz channel width with guard interval set to "short" using WiFi 5 / 802.11ac is need to achieve this on the ea6900.
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MDA400
DD-WRT User


Joined: 10 Jan 2015
Posts: 270
Location: Minnesota
PostPosted: Sun Aug 27, 2023 14:01    Post subject: Reply with quote
egc wrote:
Best BCM wifi settings is a sticky in this forum.

Just set Channel 36.

My EA6900 has a PHY rate of 866 Mb/s paired to a Samsung S20 under ideal circumstance, e.g. clean spectrum, client beside the router.

Actual throughput is of course way less



If range is preferred, OP would need to set 5ghz control and extension channel to ones in the U-NII3 band (5.725-5.850ghz - channels 149-165) which allows for more output power than the U-NII1 band where 5ghz channel 36 resides
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