Internet speed problem with 1 Giga broadband


  1. majarambuz
    Posts : 19
    Windows 10 Pro 64-bit
       New #1

    Internet speed problem with 1 Giga broadband


    Happy holidays to all!
    I've recently been upgraded to a 1 gigabyte broadband connection. We have two PCs connected by LAN. One of them achieves 800 Mbps download and 100 Mbps upload, which is within the ISP parameters, while my Lenovo T450s laptop only achieves 100-450 Mbps download and 100 Mbps upload. I've tried different cables (both Cat 5e) to no avail.
    Any tips?

    Thanks in advance
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  3. CountMike
    Posts : 19,518
    W11+W11 Developer Insider + Linux
       New #2

    That laptop may not have a Gigabit LAN but only 10/100.
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  4. TairikuOkami
    Posts : 5,452
    Windows 11 Home
       New #3

    Try TCP Optimizer and set it to: 100+Mbps - Optimal - Apply Changes.
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  6. majarambuz
    Posts : 19
    Windows 10 Pro 64-bit
    Thread Starter
       New #4

    Thank you to both, I've checked and the laptop DOES have Gigabit Lan.
    I've discovered that the problem seems to lie with Kaspersky anti virus. If it's paused, I get full speed.
    I've tried TCP Optimiser but it actually slows it down (with Kaspersky paused).
    I'll see what Kaspersky says...
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  7. Samuria
    Posts : 8,111
    windows 10
       New #5

    Check all browsers do they have a proxy set a lot of AV run a proxy to scan data which will slow connection
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