I am using Archer T4E for 1 week now, and I have this issue, once or twice a day I get a drop in connection speed, it lasts for about an hour, usually I fix it by shutting down the PC, changing the PCIe slot, Reinstall driver, or just wait.

The drop in connection speed is critical to the degree the streaming and gaming become unpossible, but there is still very slow internet access.

To make sure that the issue from the adapter, I have another computer right next to this PC, and connection always stable. Even with this PC, when using another adapter (USB adapter from different company) the issue never happened.

The configuratin applied on the network adapter:

-802.11d --> Disabled

-Beacpm Interval --> 100

-Preamble Mode --> Short & long

-Roaming Sensitivity Level --> Low

-Wireless Mode --> Auto

Any help is appreciated.

Thank you