4 Ways to Fix Ethernet Speed Capped at 100Mbps on Windows 11

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Basic Fixes:

Fix 1: Ensure Your Ethernet Cable Supports Gigabit Speeds

Ethernet cables Cat5e, Cat6, or higher are sufficient to support gigabit speeds upwards of 100Mbps. So, check the cable you’re using. If it is below this, you might need a new Ethernet cable. You can look at this table for reference:

Tip:If your device is more than 100 meters away from the router, you canget an MoCA adapterto maintain the transfer speed.

Fix 2: Adjust Ethernet Adapter Settings for Gigabit Speeds

Certain adapter settings can cap internet speed based on the configured setting. To fix this, set the adapter properties to automatically negotiate the internet speed and ensure no interference from your PC. Here’s how.

Step 1:OpenDevice Manager> click onNetwork adapters. Once the options expand, right-click on the relevantinternet adapter> click onProperties.

Step 2:Open theAdvancedtab from the menu options. Scroll down and click onSpeed & Duplex.

Step 3:Then, click on theValue drop-downand selectAuto Negotiation.

Step 4:Once done, click onOKat the bottom to close the window.

This will ensure your system negotiates the highest possible speed for your device, depending on your internet plan, router, and Ethernet cable.

Also Read:How to fix slow download speeds on Windows 11

Fix 3: Run Network Troubleshooter

You can run the network troubleshooter on your Windows 11 device to check for any common issue that might interfere with its Ethernet settings. Use this if the Ethernet link speed is still capped at 100Mbps. Follow the below steps to do it.

Step 1:PressWindows + Ito open Settings. From the sidebar menu, click onSystem. Scroll down and click onTroubleshoot.

Step 2:Here, click onOther troubleshooters.

Step 3:Go toNetwork and Internetand click onRun.

Once the troubleshooter finishes the diagnosis, follow the on-screen instructions to solve this issue and get your Ethernet speeds back up.

Fix 4: Check for Driver Updates

An outdated driver can cause issues like capping speeds on your device even when your hardware is working as expected. In this case, follow the below steps to check and install the latest driver updates.

Step 1:OpenDevice Manager> click onNetwork adapters. Once the options expand, right-click on the relevantinternet adapter> selectUpdate driver.

Step 2:Then, click onSearch automatically for drivers.

This will prompt Windows to search for the latest driver updates online. Once installed, restart your device and check again.

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Last updated on 22 April, 2024

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