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ethernet speed problem: a checklist that starts with the cheapest fix

ethernetlanlink-speedrealtek6 replies · 273 views · started
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  1. Farah Ferreira
    @nightgarage-3lq

    my Ethernet is capped at 100 Mbps and Im losing my mind.

    USB Audio Device Properties

    USB Audio Device Properties
Device status:
This device cannot start. (Code 10)

{Operation Failed}
The requested operation was unsuccessful.

    the home-built tower is plugged into a gigabit switch setup. the adapter details say 100 Mbps full duplex :D my laptop on teh same cable and port negotiates gigabit just fine, sooo teh switch port seems okay. the only change on the home-built tower was the PCIe Gigabit Ethernet 10/100/1000M Controller Driver update from Realtek. what settings should I look at?

    8
  2. Fenna Costa
    @heap_fox816

    ok but does a different cable on teh same port give gigabit?

    5 6 helpful
  4. Tomas Halvorsen
    @tomas_router
    in reply to @nightgarage-3lq

    ok so a ~95 Mbps cap almost always means the link negotaited 100 Mbps. Gigabit needs all four wire pairs, 100 Mbps only uses two. A damaged cable, a bent pin or a cheap coupler can drop it to 100. Swap teh cable first since it's teh cheapest test. hope that helps :)

    it works on my machine™

    1 1 helpful
  5. Fenna Costa
    @heap_fox816

    ok so check the adapter settings: Device Manager > Network adapters > Ethernet > Properties > Advanced. Find Speed & Duplex and make sure its Auto Negotiation. Updates sometimes reset or change this. Dont force 1000 full unless auto fails.

    5 1 helpful
  6. Noor Lopez
    @noor.lopez

    hmmmm not sure about that laptop working on the same cable doesnt fully clear teh cable. some ports are more tolerant of marginal cables than ohters. id still try a known-good cable.

    2 5 helpful

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