Problem with connectivity on the ASUS XG-C100C device
Problem with connectivity on the ASUS XG-C100C device
Hello, I’m looking for help with a network problem. I have an ASUS XG-C100C NIC installed on an MSI X570-A Pro motherboard (Ryzen 9 5900X). I’m using Windows 11 22H2 (Build 22621.1702). Currently, my download speeds are capped at around 4491.86 Mbps and upload at 1691.08 Mbps. I also have a 10 Gbit/s FTTH connection at home. An ISP technician visited my place and tested my Cat6 cable connected to the router’s 10 Gbit/s port, achieving speeds near 8 Gbit/s down and 3 Gbit/s up. I tried the same NIC with Linux Mint Cinnamon 21.1 via a bootable USB, which gave me much faster results—about 6 Gbit/s down and 3 Gbit/s up. Another NIC (OWC, the one Linus purchased for his setup) performed similarly. I need guidance on resolving this issue... thanks.
Hello Senzelian, your prompt response is appreciated. The technician used an external NIC named Solo 10G (Thunderbold 3 to 10GBASE-T / NBASE-T Adapter) during diagnostics on your iPad while connected to my Fiber Box. He also ran internal speed tests using their servers. Additionally, he conducted several speed tests via speedtest.net and https://fast.com/de/. For personal bandwidth checks, I rely on a mix of speedtest.net and https://speed.cloudflare.com, which includes latency and packet loss data. I ran the following commands, though no results were returned: ipconfig /flushdns, ipfonfig /registerdns, ipconfig /release, ipconfig /renew, netsh winsock reset. Thank you.
Internet speed tests often fall short for such fast connections. The servers usually can't match your connection speed, and the path between your ISP and theirs may lack the capacity. To confirm real speeds, you'd need to run stress tests with several users or work with your ISP directly. However, ISP technicians typically can't deliver the promised speeds using their standard methods, suggesting you're not receiving the service you paid for. Based on what I understand, you're in Germany (the ".com/de/" domain). It seems that since the start of this year, EU new contracts must meet at least 95% of the advertised speeds. You might be entitled to compensation if your ISP fails to deliver. Also, is this a private or business agreement? Who provides your internet service?
The ISP contract did reference "Up to 10 gbps." From the attached images (multiple readings by the technician), the technician managed much faster connections using Solo 10G and an iPad. I’m beginning to suspect a possible Windows limitation—perhaps in the registry or NIC configuration. On another note, Germany would need another century to match these speeds—truly a bummer. They definitely have complex bureaucracy, especially regarding infrastructure. It’s a beautiful country with friendly people. By the way, I’m based in Switzerland, which is a huge advantage. https://en.wikipedia.org/wiki/Flag_of_Switzerland And yes, it’s a private connection: https://www.salt.ch/en
Germany really dominates internet infrastructure, which is pretty impressive. I’d say it’s unfair. I wouldn’t be able to travel anymore under EU rules. Still, since you’re outside the EU, it’s hard to imagine a technician using an iPad and speed test tools. Those tests don’t really show true bandwidth because they get limited by other parts of the system. With such speeds, it’s likely the issue isn’t on your side.
I mentioned earlier that he relied on one internal speedtest and two external ones. Each showed speeds around 7 to 8 gbps. Unfortunately, it seems the issue lies with my side. I’m aware of this because I also ran tests using a secondary NIC—see the attached photo. All outcomes matched closely with those from the ASUS NIC. Moreover, both NICs employ distinct chips and controllers.