Intel Killer BE1750x blocks certain connections

[Pallemann]

Hello,

I recently bought the Intel® Killer™ Wi-Fi 7 BE1750x for my desktop PC, as my motherboard doesnt have built in WiFi connectivity. After installing the WiFi card in the designated M2 slot on my motherboard, I observed a strange behavior, as the connection to the internet seems to be working for some connections and for others they seem to be blocked.

Example:

• google.com works
• fritz.box works
• reddit.com does not work

My hardware specifications:

• Motherboard: ASRock B660 Steel Legend
• CPU: 12th Gen Intel(R) Core(TM) i5-12400F
• OS: Windows 11 Pro
• Installed driver as checked by Intel® Driver & Support Assistant: 23.90.0.2
• Router: FRITZ!Box 7530 AX

The networks adapter is recognized as a valid device, as it is listed in the device manager. When opening the properties of the device and then the Events tab the most recent message is:

Device PCI\VEN_8086&DEV_272B&SUBSYS_17741A56&REV_1A\4&cccf150&0&00E3 had a problem starting. and Device not started (Netwaw16)

Running the Intel System Support Utility, the device is also not listed under network adapters.

Despite that, a connection to the router is possible and switching networks also works.

And the Intel® Driver & Support Assistant does recognize the device and lists the drivers as "Up to date".

I tried changing networks and used my phone as a personal hotspot to connect to. While connected to my phone, I didnt experience any issues. All websites were available and reachable.

I also have a laptop with an Intel(R) Wi-Fi 6 AX201 adapter, which I connected to the same network as my PC. No issues there either. All websites are reachable for my Laptop.

Solution attempts I have tried without result:

• reinstalling Bluetooth and WiFi drivers manually
• uninstalling device via the device manager and reinstalling it
• resetting router to factory settings
• uninstalling Intel performance suite
• buy replacement WiFi card, under suspicion that the first one was broken
• trying the solution from another community post: Solved: wifi connection problem - Intel Community  
• set the router channels to manual and set 2.4GHz to channel 11 and 5GHz to 48

I don't understand where the issues might be or how to solve them. I have used up all the solution attemps I can think of or find online. Can you help?