Port connected via Ethernet cable
Port connected via Ethernet cable
I have an ASUS TUF X299 Mark II motherboard. My ISP is Spectrum, and I also use a 5G Wi-Fi PCIe card. Recently, my connection was fast at over 450 Mbps, but it dropped to around 25 Mbps when using the wired setup. Now I’m unsure why the wireless card still shows high speeds. I’ve changed cables, coaxial cables, and even tested with an ISP test box—everything seems okay. My LAN port is still active but not fully dead. I’m not sure if it’s dying gradually or something else is happening. Any advice would be appreciated.
Do you have a device like a laptop that you can use to check the cable performance? If you notice higher speeds on your PC (or another computer) using the same cable, the next step might be creating a bootable Ubuntu Linux USB drive, booting from it, and testing the speeds under Linux. Faster results there suggest the issue is software-related rather than hardware. If you still experience slow speeds even after switching to Linux, it likely points to a hardware problem, possibly requiring a PCI-E Ethernet card.
The laptop displays a reading of 450+ using the same cable, and both PCs are running Windows 10 Pro. That made sense, but I wanted to double-check or try another solution before taking the motherboard to RMA. It seems the ports are slowing down significantly even when they're not completely dead, which is unusual since I'm used to components failing. I’ve learned something new and it’s cool! Thanks for your help!