You have connected your PC to the home router with a LAN cable: Since both endpoints support Gigabit Ethernet, fast and stable data exchange should be ensured. Recently, however, you have noticed that the pace is not particularly fast – for example when connecting to other devices in the home network, such as the NAS system.
In this case, first check whether the current connection is actually working at gigabit speed: To do this, open the properties of the LAN connection in the settings on a Windows computer. You can find it under “Network and Internet -› Ethernet ”when you tap on the corresponding connection, which is usually called“ Network ”. In your case, the entry “1000/1000 (Mbps)” should appear under “Properties -› Connection speed ”.
If this is not the case, you should definitely replace the LAN cable: In many cases, the copper wires are damaged. All eight wires must work for gigabit speed, otherwise the connection speed can drop back to Fast Ethernet (100 Mbps), for which only four wires are necessary. In order to damage the wires, no damage has to be visible from the outside, such as a clear kink in the cable: Sometimes it is enough if you have run your office chair over the cable, accidentally jammed it in the door of the room, or even just on that Cables have risen.
That’s right: With a working gigabit connection, you will see the entry with “1000 Mbps” in the Windows settings.
If you use a new cable, check whether it complies with the Cat5e standard – a corresponding label on the cable jacket provides information. You are absolutely on the safe side with a Cat6 cable, as some inexpensive Cat5 cables do not reliably support the high gigabit speed either. Also check whether the cable ends are firmly seated in the LAN sockets on the router and computer – and that these sockets do not wobble when touched.
Fritzbox owners can also check the menu to see whether the gigabit port on the router is actually working at full speed: To do this, go to “Home Network -› Network – ›Network Settings” in the Fritzbox menu. Under “LAN settings” you can see whether the LAN port in question works in power mode with gigabit speed or in economical green mode with 100 Mbit / s.
If changing the cable does not improve the LAN speed, Fritzbox owners check the correct speed settings in the router menu.
If nothing changes in the slow LAN speed despite these measures, things get complicated: The next step is to update the driver for the network card in the computer. You can then look in the driver properties to see whether the “Auto Negotation” setting is active there. To do this, open the Windows Device Manager and double-click on the entry for the network card, which you will find in the “Network adapter” section. You will find the hardware properties in the “Advanced” tab – under “Speed & Duplex” you will find the entry you are looking for in the “Value” window.
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