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Why did my LAN network speed (cable) drop to 10 Mbps?

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Typically this sort things points to a bad Ethernet cable. Even a very good cable can develop problems over time as the conductors are bend or the connectors are pulled on. read more

That sounds like a broken cable, or a bad switch port. Your network cable has 8 cores in it. You could have a broken core, or it could even be a really old Cat3 cable. You want Cat5e or Cat6 these days. These can handle gigabit speeds. Also check in the device settings in Windows that Duplex data flow and auto speed sensing is configured correctly. read more

Now double click on Local Area Connection and take a look at speed. If it show 10 Mbps that means your connection is limited and is not working at full speed. Fix Local Area Connection Limit to 10 Mbps. To fix this limit problem, again go to Network Connections, right click on Local Area Connection and hit Properties. read more

Most network "cards" auto-negotiate a connection speed by default. This can be set to whatever rate you want via the properties of the "card" in Device Manager. However, my understanding is that this might result in unreliability if there is a hardware problem. Try a genuine Cat 5e Ethernet cable first before attempting to set the speed manually. read more

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LAN limited to 10Mbps
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