LAN connection only functions at 10Mbps on this Asrock B550M pro4 motherboard.
LAN connection only functions at 10Mbps on this Asrock B550M pro4 motherboard.
Hi, I'm working on Windows 11 23H2 version 22631.3737 pc... I've relied on Ethernet for a while now. Recently, the connection has become unstable. It appears normal in the notification center, but I can't access the internet. My router supports both WIFI and USB adapter, and it connects without issues. I assumed a problem with the cable or router, so I changed them but the issue remains. After reinstalling the OS, I've tried both Windows 11 22H2 and 23H2, but nothing has improved. The Ethernet interface doesn't send any data packets and won't connect to the admin panel. Sometimes it works unexpectedly. After some research, I tried booting in safe mode with networking, which only functions at 10Mbps—even though my ISP offers 50Mbps. Only one driver is active during normal startup (Realtek PCI(e) Ethernet), while another (Realtek PCIe GbE) needs the TCP Optimizer software to work, but it still operates at 10Mbps. My TV also behaves similarly. The lights on the card aren't lit and don't blink. I've experimented with other operating systems like Ubuntu 22 LTS, but the problem persists at 10Mbps. I've performed a fresh OS install, network reset, driver updates, and run various commands without success. No improvement is visible. Could you help identify the issue and suggest a solution? Please share any additional details or logs if possible. Thank you. Network cards: Realtek RTL8188EU Wireless LAN 802.11n USB 2.0 Ethernet Adapter Onboard: Realtek RTL8111H (ASRock Bm550m pro4) OS: Windows 11 23H2 ISP: 50Mbps Spectrum Router: H660GM-A
Do you have the LAN driver set up? It varies from a Wi-Fi driver to a LAN driver.
The drivers should be installed; RTL8111H is widely supported and comes with built-in Windows support. If needed, check Asrock's motherboard page for additional driver options compatible with your Windows version. Begin by examining the Ethernet cable first. Next, look at the physical Ethernet port on the motherboard—those spring contacts can sometimes shift out of place, causing speed drops. Ensure all eight pins are aligned and not bent or stuck; they should feel flexible when lightly pressed with a small tool like a screwdriver or paperclip. Ethernet cables require four wires for 10 Mbps or 100 Mbps, but eight are needed for gigabit speeds. If any of the extra wires aren’t properly connected to the port or are damaged, the connection will drop to 100 Mbps at best. Also verify your Ethernet port’s speed limit—some ISP ports cap at 100 Mbps due to plan restrictions, which could prevent higher speeds even if the cable is fine. If your router only supports up to 100 Mbps, your card won’t reach 1 Gbps regardless of settings. You haven’t specified your router model, so I can’t confirm compatibility. To try a faster connection, open Device Manager, locate your Ethernet adapter, right-click and choose properties, then adjust the advanced settings to force a specific speed or reboot to apply changes.
Hi thanks for reply, I've tried this but didn't worked out and i've noticed that i don't have power saving option in advance menu for any driver...And I'll make sure that pin bent situation thing and You are right about My router can only support full duplex 100Mbps but My laptop is Gbps port and it connects and i've raspberry B+ which also shows 100mbps and My ethernet was working fine few weeks before it's kinda started working as recentonly & i didn't changed My plan with ISP...from then. My router : H660GM-A
These "optimizer" solutions may not be effective. Ensure the Ethernet controller isn't configured for a 10 meg connection. Consider disconnecting the device from power for at least 15 minutes before reconnecting and testing again. Verify you have the appropriate drivers installed for your network interface card. Do you have another computer available to test this cable?
Hey, I've experimented with another cable and the same one on another laptop—it functions there but not in the PC. Also, the Ethernet lights aren't lighting up. It connects at 100 Mbps, yet it doesn't receive any enough packets after the optimizer; only the optimizer seems to work.