Fix Ethernet Speed Capped at 100Mbps On windows. || 2023

Introduction

In this tutorial, we will address the issue of Ethernet speed being capped at 100Mbps on Windows systems. This problem can affect your internet performance, especially if you have a higher-speed internet plan. By following these steps, you can potentially resolve the issue and achieve the speed you expect.

Step 1: Check Network Adapter Settings

• Open the Device Manager:

  • Right-click on the Start button and select Device Manager.

• Locate your network adapter:

  • Expand the Network adapters section to find your Ethernet adapter.

• Access the adapter properties:

  • Right-click on your Ethernet adapter and select Properties.

• Go to the Advanced tab:

  • In the properties window, switch to the Advanced tab.

• Adjust the speed and duplex setting:

  • Find the Speed & Duplex option.
  • Change the value to 1.0 Gbps Full Duplex (or the highest option available).

• Click OK to apply the changes.

Step 2: Update Network Drivers

• Return to the Device Manager and right-click on your Ethernet adapter.
• Select Update driver.
• Choose Search automatically for updated driver software.
• Follow the prompts to install any available updates.
• Restart your computer to ensure the changes take effect.

Step 3: Modify Windows Registry (Advanced Users)

Warning: Editing the Windows Registry can cause system issues if done incorrectly. Proceed with caution and back up the registry beforehand.

• Press Windows + R to open the Run dialog.
• Type regedit and press Enter to open the Registry Editor.
• Navigate to the following path:

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}
  

• Look for your Ethernet adapter (it may be listed by its name or a series of numbers).
• Locate the Speed value and double-click it.
• Change the value to 1 for 1 Gbps or the appropriate value for your desired speed.
• Click OK and close the Registry Editor.

Step 4: Check for Windows Updates

• Go to Settings by pressing Windows + I.
• Select Update & Security.
• Click on Check for updates and install any available updates.
• Restart your computer if updates were installed.

Step 5: Test Your Connection Speed

• After completing the above steps, test your Ethernet speed using an online speed test service like Ookla Speedtest.
• Compare the results to determine if your speed has improved.

Conclusion

By following these steps, you can troubleshoot and potentially fix the issue of Ethernet speed being capped at 100Mbps on your Windows system. Remember to check your adapter settings, update drivers, and be cautious when modifying the registry. If the problem persists, consider consulting with your internet service provider for further assistance. Enjoy your improved internet speed!