Windows 10: Realtek Gaming 2.5GbE Family Controller limited to 100mbps

Good morning,I recently upgraded to an ASUS PRIME B760M-A WIFI D4 motherboard, and ever since, I haven’t been able to get my Ethernet connection speed above 100 Mbps, even though I previously had a stable 1 Gbps connection with my old setup running Windows 10. Now that I updated to Windows 11i have this problemetails:Network adapter: Realtek Gaming 2.5GbE Family ControllerCurrent link speed: 100/100 MbpsMy internet plan provides speeds up to 1 Gbps. I'm using a CAT 6 Ethernet cable, tested and in perfect conditionI have installed drivers from:The ASUS official website for my motherboardThe

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Realtek PCIe GbE Family Controller limited to 100mbps

Hello there! I am Charity, I'm an Independent Advisor and a Microsoft user like you.

I'm glad to help you today!

I understand you need help in regards with your network adapter limited only to 100 mbps.

Have you double-check if your network adapter supports Gbps speeds? And in regards with that, may I know the type of Realtek PCIe GBe Family Controller you're using?

You can check that from:

1. Open Device Manager > Expand Network adapters

2. Double-click on Realtek PCIe GBe Family Controller

3. Go to Details tab > Under property drop down, select "Inf section"

4. Provide what is stated in the Value.

 

Realtek PCIe GbE Family Controller limited to 100mbps

Both router and powerline adaptor limited to 100mbps link speed

 

Realtek PCIe GbE Family Controller limited to 100mbps

I see. There's definitely something going on with your PCIe controller. Since you've already installed the drivers, may I confirm if that also include the Realtek PCIe GbE Family Controller? And did you downloaded the drivers from the motherboard's manufacturer website?

You can try to disable and re-enable the PCIe controller. Another thing to try is to reinstall the Realtek PCIe GbE Family Controller driver.