AX211: Large Difference In TX and RX Rates

[DallasP]

Dell XPS 13 Plus 9320 with AX211 Wi-Fi. All drivers up to date.

Router is a GL.iNet Flint 2 (GL-MT6000) running OpenWrt 24.10.4

Windows: netsh wlan show interface

    Band                   : 5 GHz
    Channel                : 104
    Connected Akm-cipher   : [ akm = 00-0f-ac:08, cipher =  00-0f-ac:04 ]
    Network type           : Infrastructure
    Radio type             : 802.11ax
    Authentication         : WPA3-Personal  (H2E)
    Cipher                 : CCMP
    Connection mode        : Auto Connect
    Receive rate (Mbps)    : 1922
    Transmit rate (Mbps)   : 865
    Signal                 : 83%
    Rssi                   : -58

On the Router: iw dev phy1-ap0 station get '<mac address of laptop'

        signal:         -80 [-88, -83, -87, -86] dBm
        signal avg:     -79 [-85, -82, -85, -88] dBm
        tx bitrate:     1729.6 MBit/s 160MHz HE-MCS 8 HE-NSS 2 HE-GI 0 HE-DCM 0
        rx bitrate:     576.4 MBit/s 160MHz HE-MCS 3 HE-NSS 2 HE-GI 0 HE-DCM 0
        last ack signal:-70 dBm
        avg ack signal: -73 dBm

I tried many power and advanced adapter settings and I cannot get the TX close to the RX rate.

The HE-MCS values explain the differences, but why?

Thanks all.

[JedG_Intel]

Hello DallasP,

Thank you for posting on Intel Community Forum.

To address the issue properly, please share the information below.

1. Is this the original adapter that came pre-installed in your system, or have you changed/installed a new adapter recently?

2. Were you able to have wireless connection in a normal/expected performance before?

3. Do you remember if this issue happened after a new OS update or Wireless driver update?

4. What driver version are you using?

5. Is this issue happening at home, office environment or both?

I look forward to your response.

Best regards

Jed G.

Intel Customer Support Technician

[DallasP]

Hi Jed,

1. Is this the original adapter that came pre-installed in your system, or have you changed/installed a new adapter recently?

- It is the original adapter that came pre-installed in the laptop.

2. Were you able to have wireless connection in a normal/expected performance before?

- Yes

3. Do you remember if this issue happened after a new OS update or Wireless driver update?

- No, it has been happening for at least a year. 

4. What driver version are you using?

- Intel 23.170.0.1

5. Is this issue happening at home, office environment or both?

Both

Thanks in advance for your help!

[JedG_Intel]

Hello DallasP,

Thank you for sharing all this information. To proceed, could you kindly generate a System Support Utility report so we can review your system components and configuration? You can follow the steps outlined here: . You can follow the steps here: How to get the Intel® System Support Utility Logs on Windows*

Additionally, have you had the opportunity to try installing the drivers from Dell? We strongly recommend using drivers provided by your system manufacturer, as these are specifically customized to ensure full compatibility and optimal performance with your device.

If you have any questions, please let me know.

Best regards

Jed G.

Intel Customer Support Technician

[DallasP]

System Support Utility file attached.

The drivers from Dell are the same version as from Intel. Just one release old that already had the same issue.

Thanks.

[JedG_Intel]

Hello DallasP,

Thank you for providing the System Support Utility report—I really appreciate your effort in sharing that. After reviewing the manufacturer’s website, I found that the latest available driver version is 36.25.3247. Could you please try installing this version even though this is older than the one coming from Intel and let me know how it goes? If the issue continues to persist after updating, feel free to reach out so we can explore the next steps together.

Best regards

Jed G.

Intel Customer Support Technician

[JedG_Intel]

Hi DallasP,

I wanted to check if you had the chance to review the recommendation I posted. Please let me know at your earliest convenience so that we can determine the best course of action to resolve this matter.

Best regards,

Jed G.

Intel Customer Support Technician

[DallasP]

Yes, I installed the driver from Dell's website.

I'm still seeing differences in Receive and Transmit rates.

Receive rate (Mbps) : 1297
Transmit rate (Mbps) : 865
Signal : 80%
Rssi : -66

[JedG_Intel]

Hello DallasP,

Thank you for attempting the recommended steps. Since the issue persists, I will need to conduct an internal investigation to determine the next course of action. I will provide you with an update as soon as additional information becomes available.

Best regards

Jed G.

Intel Customer Support Technician

[JedG_Intel]

Hello DallasP,

I'm reaching out to provide you with an update. After reviewing the System Support Utility logs, it shows that:

Mixed Mode Protection: RTS/CTS Enabled (0)

• For a stable home network (-35 dBm to -55 dBm, no interference or legacy devices):

Change to: CTS-to-self Enabled (1) → This can improve TX rates.

• For office or public networks: Keep RTS/CTS Enabled (Mixed Mode Protection).

Also, at -80 dBm signal strength, it’s normal for RX rates to be higher than TX rates due to factors like antenna chains and AP power levels being greater than the client.

If the issue persists, please let me know.

Best regards

Jed G.

Intel Customer Support Technician

[VonM_Intel]

Hello DallasP,

Have you had a chance to review my previous response? Please let us know if you require any further assistance. I'm here to help.

Best regards

Von M.

Intel Customer Support Technician

[JedG_Intel]

Hello DallasP,

I have not heard back from you so I will close this inquiry now. If you need further assistance, please submit a new question as this thread will no longer be monitored.

Best regards,

Jed G.

Intel Customer Support Technician

[DallasP]

Thanks for your help.