Problem Description 

If you experience slow internet speed while using a wireless network card, you can refer to this article for troubleshooting.

Solutions: 

1.Weak Signal 

① Distance and Obstacles: If the wireless network card is too far from the router and there are many obstacles such as walls and doors in between, the signal strength will be significantly attenuated. It is recommended to place the wireless network card closer to the router and avoid keeping a large distance.

② Hidden Location: If the wireless network card is placed in a concealed location such as under the desktop, behind the computer case, or inside a cabinet, it may not receive a good wireless signal. It is advisable to install the wireless network card in a more open and unobstructed location, such as on the desktop or near the router.

2.Signal Interference 

① 2.4G Single - Band Network Card**: If the wireless network card is a 2.4G single - band card, try switching the 2.4G wireless channel of the router for comparison testing. 

② 2.4G & 5G Dual - Band Network Card: If the wireless network card is a 2.4G & 5G dual - band card, it is recommended to turn off the multi - frequency fusion on the router and let the network card connect to the 5G signal.

③ Avoid Interference Sources: Try to avoid interference from other strong magnetic devices (such as microwaves, Bluetooth speakers, etc.) when using Wi - Fi.

3.DNS - Related Configuration Modify

the DNS of the computer's wireless network card to 8.8.8.8/8.8.4.4

4.Network Card Settings Issue Problems 

with the network mode and bandwidth settings of the wireless network card can lead to a low negotiation speed, resulting in slow or even failed Wi - Fi network connection. For example, if the network mode is 802.11b/g, the negotiation speed will not exceed 54Mbps, and the actual network speed will be slower in real - world environments. 

Note: If the wireless protocol is normal, the negotiation rate is only 54Mbps, please refer to this link method

5. Hardware Problems

Faults, Aging, or Compatibility**: There may be hardware faults with the wireless network card or router, or the wireless network card may be aging or have compatibility issues.

① Update Drivers: Ensure that the wireless network card driver is up-to-date.

② Reinsert or Change Ports: Reinsert the wireless network card, or try inserting it into a different USB port (applicable to USB network cards). -

③ Replace Hardware: Replace the wireless network card or router, especially if the old devices do not support newer Wi - Fi standards such as Wi-Fi 5 or Wi-Fi 6.

6. Other Issues 

Compare with Other Devices: Test the network speed of other devices (such as mobile phones, tablets, or other computers) in the same network environment and compare it with the device using the wireless network card.