F5F Stay Refreshed Power Users Networks Only 5 GHz operation is supported on a 20 MHz channel width

Only 5 GHz operation is supported on a 20 MHz channel width

Only 5 GHz operation is supported on a 20 MHz channel width

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alexmendoza
Junior Member
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37
10-03-2019, 08:27 AM
#1
Hey everyone, I recently switched from a 75Mbit to the upgraded 150Mbit connection in Austria. Until now, my PC stayed connected through PowerLine with plenty of bandwidth. After the upgrade, the LAN speed stabilized around 55Mbit—still fine. All Wi-Fi devices, whether smartphones or laptops, connect easily to the 5GHz band and make full use of the new speed. To keep things running smoothly on my PC, I installed an ASUS AX3000 Dual Band Wi-Fi 6 adapter. Interestingly, it doesn’t easily reach 5GHz (only about 33Mbit). I tried several settings: static IP with DNS, changing the adapter to 802.11ac instead of 802.11ax, using different SSIDs, and even switching to 2.4GHz. None worked well.

On the positive side, connecting new devices via the Connect Box on 5GHz was a breeze—work notebooks connected instantly with full bandwidth. I also tried linking my mobile hotspot to 5GHz: mobile 5GHz link worked perfectly (42Mbit download), and another phone connected fine (38Mbit). After some digging, I found the issue: three recurring Win Event logs pointed to Wi-Fi problems—timeouts, DNS failures, and adapter errors.

I adjusted the PCI-E module settings, setting a fixed 20MHz channel width instead of auto. This gave me a more stable 5GHz connection now. However, even with this change, the maximum speed is still limited to around 90Mbit (instead of the full 150Mbit). I can’t change other channel widths on the module. It’s unclear if the problem lies with the adapter or the router—my router supports up to 60MHz channels, but I haven’t changed anything there either.

Any tips would be greatly appreciated. Thanks!
Shizo
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A
alexmendoza
10-03-2019, 08:27 AM #1

Hey everyone, I recently switched from a 75Mbit to the upgraded 150Mbit connection in Austria. Until now, my PC stayed connected through PowerLine with plenty of bandwidth. After the upgrade, the LAN speed stabilized around 55Mbit—still fine. All Wi-Fi devices, whether smartphones or laptops, connect easily to the 5GHz band and make full use of the new speed. To keep things running smoothly on my PC, I installed an ASUS AX3000 Dual Band Wi-Fi 6 adapter. Interestingly, it doesn’t easily reach 5GHz (only about 33Mbit). I tried several settings: static IP with DNS, changing the adapter to 802.11ac instead of 802.11ax, using different SSIDs, and even switching to 2.4GHz. None worked well.

On the positive side, connecting new devices via the Connect Box on 5GHz was a breeze—work notebooks connected instantly with full bandwidth. I also tried linking my mobile hotspot to 5GHz: mobile 5GHz link worked perfectly (42Mbit download), and another phone connected fine (38Mbit). After some digging, I found the issue: three recurring Win Event logs pointed to Wi-Fi problems—timeouts, DNS failures, and adapter errors.

I adjusted the PCI-E module settings, setting a fixed 20MHz channel width instead of auto. This gave me a more stable 5GHz connection now. However, even with this change, the maximum speed is still limited to around 90Mbit (instead of the full 150Mbit). I can’t change other channel widths on the module. It’s unclear if the problem lies with the adapter or the router—my router supports up to 60MHz channels, but I haven’t changed anything there either.

Any tips would be greatly appreciated. Thanks!
Shizo

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AdamKoudy
Senior Member
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740
10-04-2019, 09:53 PM
#2
Typically external antennas perform better for reception than mounting them directly on the PC back, since you can adjust their position for optimal signal. However, there are rare cases where the back antenna might offer a clearer line of sight to the router, resulting in weaker signals despite the flexibility. Alternatively, the case could block interference from other networks. It may also stem from a driver problem—likely related to the Intel AX200 chipset, so switching to ASUS drivers could help. Sometimes Windows auto-installing drivers causes issues, and if the hardware itself is faulty, past reviews suggest potential problems.
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AdamKoudy
10-04-2019, 09:53 PM #2

Typically external antennas perform better for reception than mounting them directly on the PC back, since you can adjust their position for optimal signal. However, there are rare cases where the back antenna might offer a clearer line of sight to the router, resulting in weaker signals despite the flexibility. Alternatively, the case could block interference from other networks. It may also stem from a driver problem—likely related to the Intel AX200 chipset, so switching to ASUS drivers could help. Sometimes Windows auto-installing drivers causes issues, and if the hardware itself is faulty, past reviews suggest potential problems.

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