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Realtek Gaming GbE Family Controller auto capping to 100mbps

Anonymous
2024-10-15T23:08:01+00:00

Hi there. I have had my HP Omen 17 Gaming laptop for a few years, and suddenly ethernet on my pc is now capped at 100 Mbps.

Here's what I've tried to fix it:

  • Updated drivers -- downloaded straight from Realtek
  • Checked for malware -- 2 different scanner applications (deep scanned)
  • configured the card for specific params:
    • Auto Disable GB is off
    • Energy-efficient Ethernet is off
    • Gigabit Lite is off
    • Green ethernet is off
    • Power power-saving mode is off
    • speed and duplex (I will explain later on)
  • checked for updates
  • checked the actual integrity of the card (like if it was damaged)
  • ran windows troubleshooter
  • I have a CAT 5e cable that runs 1000mbps (tested with different pc)
  • the internet for the house runs at 1000mbps

UPDATE:

  • ALso tried all of the flushing commands and network reset commands
    also tried to reset the network from the reset network option in settings
  • also restarted the modem

explanation for the speed and duplex:

I have set the speed and duplex settings to auto-negotiate but nothing happens. I have manually set it to 1GBps and the weird thing is that when I press accept, I look at the link speed value in the settings application, and it changes to 1000 for 5 seconds, where it then promptly returns to 100 Mbps.

***moved from Gaming and Xbox / Hardware and network / Networking help***

Windows for home | Windows 11 | Devices and drivers

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2024-10-16T15:31:43+00:00

    Dear MaddicJordan

    Thank you for posting in the Microsoft community.

    The issue you are experiencing with the Realtek Gaming GbE controller automatically capping at 100 Mbps may be related to a number of factors. You have performed a lot of troubleshooting and settings adjustments, here are some further suggestions and possible solutions:

    1. Check the Ethernet adapter settings

    Although you have tried many settings, make sure the following settings are correct:

    Open Device Manager:

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

    Locate “Network Adapters”, right click on the Realtek Gaming GbE Controller and select “Properties”.

    In the Advanced tab, ensure the following settings:

    Speed & Duplex: Set to “Auto-Negotiation”.

    Flow Control: Enable (if available).

    Jumbo Frame: Try to enable this option if it is available (this usually improves performance).

    1. Update BIOS

    Sometimes, updating your laptop's BIOS can resolve hardware compatibility issues. Visit the official HP website to find the BIOS update for your model and follow the instructions.

    1. Check network cables and ports

    Although you mentioned using a 1000 Mbps CAT 5e cable, make sure:

    The cable is intact: Check the cable for physical damage.

    Using a different port: If you are connected to a router or switch, try switching ports to rule out the possibility of a port failure.

    1. Check the router settings

    Make sure the port settings of the router are correct:

    Log in to the router's management interface and check for any restriction settings. Make sure that QoS (Quality of Service) or bandwidth management features are not enabled, which may limit the speed of a particular port.

    Make sure the router firmware is up-to-date; sometimes older firmware can cause compatibility issues.

    1. Try Different Driver Versions

    Although you have downloaded the latest driver from Realtek, sometimes it is better to use a previous stable version:

    1. In the Device Manager, right-click on the Realtek controller and select “Uninstall Device”.
    2. Make sure “Remove driver software for this device” is checked.
    3. Restart your computer and Windows will attempt to reinstall the driver.
    4. If the problem persists, try installing an older version of the driver.
    5. Use command line tools

    Run the following command at the command prompt to reset the TCP/IP stack:

    netsh int ip reset

    netsh winsock reset

    ipconfig /flushdns

    ipconfig /release

    ipconfig /renew

    and then restart the computer.

    1. Check the power management settings

    Ensure that the network adapter's power management settings are not causing speed limitations:

    1. In Device Manager, right-click on the Realtek controller and select Properties. 2.
    2. In the Power Management tab, make sure that “Allow the computer to turn off this device to save power” is unchecked.
    3. Consider hardware failure

    If all of the above fails to resolve the issue, you may need to consider a hardware failure in the network adapter itself. You can try:

    • Test with a USB Ethernet adapter to see if it is capable of 1 Gbps speeds.
    • If possible, contact HP Support and ask if the network adapter can be replaced.

    With these steps, you should be able to locate and resolve the Realtek Gaming GbE Controller speed limitation issue. If the issue persists, please feel free to update me and I will continue to help.

    Best Wish

    Shawn.Z-MSFT | Microsoft Community Support Specialist

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