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Realtek Gaming 2.5Gbe Family Controller Download Speeds Capped and Slowed

Anonymous
2023-06-02T10:04:00+00:00

Hello,

I've recently encountered an issue with slow download speeds over Ethernet. My broadband package allows speeds of around 320Mbps, which I've been using at it's maximum for around two years with no issues. Over the last few weeks, however, my speeds seem to have been randomly capped at anywhere between 70-100Mbps.

At first I could solve this issue by unplugging and re inserting the Ethernet cable, but that no longer seems to work.

I've tried all common fixes including ensuring all drivers are up to date, as well as rolling back the adapter drivers, configuring the "Speed and Duplex" settings, changing the DNS, but nothing seems to have worked so far.

The cable I'm using is a Cat 7 high speed Ethernet cable, which has allowed me to utilise the maximum speeds available to me, up until this issue started.

I know it is not a problem with my router, as I can get max speeds on other devices, and over Wi fi.

Weird thing as well is that my motherboard (Gigabyte Z790 Aorus Pro Elite) came with a Wi Fi adapter. Tried that and I'm still getting the same results. Usual Wi Fi download speeds at my house are around 290Mbps.

I'm certain this is a Windows / software related issue, but I'm really stumped at the moment. Any help would be much appreciated.

Windows for home | Windows 11 | Internet and connectivity

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  1. JosephT71 9,210 Reputation points
    2023-06-02T15:50:54+00:00

    That's your weakest link.

    Image

    Which means that your wifi router or ethernet router is not set up correctly. The problem is on the router side, not on your pc side.

    7 people found this answer helpful.
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  2. Anonymous
    2023-06-02T13:19:50+00:00

    Your Link speed is showing 100/100, which means you are limited to the slowest speed that system does. You probably only have one flashing light on the Ethernet port when you should have at least an amber flashing.

    Changing the Ethernet cable is usually an easy way to check it. Beyond that, possibly there is an interference which is causing the system to be negotiating a slower connection.

    I will have to assume your IPv4 DNS server address is correct but mine just shows the router address.

    1. Realtek^®^ 2.5GbE LAN chip (2.5 Gbps/1 Gbps/100 Mbps)

    5 people found this answer helpful.
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  3. franco d'esaro 24,991 Reputation points Volunteer Moderator
    2023-06-27T16:30:09+00:00

    I understand from your response to Saltgrass that you are not using a standard 1.5 meter long network cable but rather a long network cable. Did you build this cable yourself or did you already buy the predetermined length?

    Temporarily move your PC close to your router and connect it to it using a standard 1.5m long CAT 5e or CAT 6 network cable and test the speed again.

    4 people found this answer helpful.
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  4. Anonymous
    2023-06-27T15:52:02+00:00

    The only thing I haven't tried so far as a new Ethernet cable. I'm kind of reluctant to go through the effort of disconnecting my old cable which is run across the house and up a set of stairs. Also, because I'm not consistently getting capped speeds, I tend to think the cable itself is OK. I'm pretty certain this is a software / Windows problem, but I'm not sure how. All drivers up to date in the bios, in Windows and for the Ethernet port specifically. In fact, I just did a speed test moments ago and hit 320Mbps (maximum speeds for my package). Whereas last night I was getting 90Mbps. It's so inconsistent and intermittent that I'm really not sure what the actual issue is.

    I did not know that about Cat7 cables though, so I might try a different cable. Thanks for your reply!

    3 people found this answer helpful.
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  5. Anonymous
    2023-06-02T11:47:52+00:00

    Hello! My name is Mostafa; I will assist you today.

    I’m sorry that you are experiencing this issue. Please follow the steps below:

    Update Drivers with Device Manager

    1. Right-click on Start, then select Device Manager.
    2. Select a device category, then right-click the one you like to update.
    3. Select Update driver, then click Search automatically for drivers.
    4. If Windows can't find an update, visit the device manufacturer's website and check for available driver updates.

    Check for Windows updates. Settings > Windows update > Check for Windows update.

    Update Bios by visiting your MB manufacturer's website.

    Run Network Troubleshooter.

    1. In Windows 10, go to the Troubleshoot tab by going to Start > Update & Security.
    2. Locate Network Connections and click Run the troubleshooter.
    3. Finish the process by following the on-screen instructions.

    Reset TCP/IP Configuration

    1. Run Command Prompt as administrator.
    2. Input these two commands and press Enter after each one:

    netsh winsock reset

    netsh int ip reset c:\resetlog.txt

    netsh int ip reset

    ipconfig /release

    ipconfig /renew

    1. Restart your Computer.

    Temporarily disable any third-party antivirus or firewall software to check if they are causing any network slowdowns. Sometimes, these security programs can interfere with network traffic.

    Test download speed in clean boot.

    https://support.microsoft.com/en-us/topic/how-t...

    Please let me know if the above steps did not help. Thank you.

    3 people found this answer helpful.
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