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I have a 120Mb/s Internet connection and it works well on my laptop with 1Gb/s network card and Windows 7. But it works too slow on another computer which is older and which have 100Mb/s network card and also Windows 7. Both computers are connected via wired Ethernet.

I realize that I won’t get the full 120Mb/s on a 100Mb/s network card, but as far as I know it should work with speed about 90Mb/s, but it is only getting about 35 Mb/s.

I am using Ubee EVW3226 modem/router device and I have updated network card drivers on the systems in question.

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2 Answers

Few things to try (test your speed after each step to see if the problem persists):

  • Connect the computer to the router using a different ethernet cable.
  • If you have a switch in between the computer and the router, try connecting the computer directly to the router.

  • Check link speed/duplex:

    1. Press Win + R to open the Run menu, and type devmgmt.msc to open Device Manager
    2. Expand Network adapters and double-click the appropriate adapter
    3. Navigate to the Advanced tab
    4. Select Link Speed & Duplex from the Property list and make sure its value is set to Auto Negotiation.

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  • Reset the TCP/IP stack1:

    1. Click Start, search for cmd
    2. Right-click cmd.exe and click Run as administrator
    3. Type netsh int ip reset c:\resetlog.txt and hit Enter
    4. Reboot the computer.

1You can also use the Fix it wizard from the following link:

A corruct TCP/IP stack can cause several issues with the network connection. Resetting the TCP/IP stack will overwrite the following registry keys:

SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
SYSTEM\CurrentControlSet\Services\DHCP\Parameters

This has the same effect as removing and reinstalling TCP/IP ().

If none of the above solves the problem, your network adapter may be bad, or you could have some sort of malware which is hogging the bandwidth.

1

I have two Windows 10 PCs, both with wire connection to the same router. One was giving me 5Mbps downloads and the other 60Mbps. Tried rebooting and resetting TCP/IP as described here. No help. Then I found a suggestion to reboot to Safe Mode with Networking to try to determine if the problem was hardware related. In Safe Mode with Networking all was fine (60Mbps on the “slow” computer too). Rebooted normally and all remained fine.

No idea what was going on, but problem resolved.

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