Compare Windows 10 speedtest.net performance with Ubuntu.
Compare Windows 10 speedtest.net performance with Ubuntu.
I've added this to the networking section, though it seems unsuitable given my previous troubleshooting steps. The problem is on Windows. Please copy and paste the original text with a few adjustments. I'm near the end of my Latin and might start to lose my mind. I live in Belgium and my ISP provides gigabit speeds down the line. I turned it on, but I rarely exceed 200 Mbps. I contacted the ISP, and a technician performed speed tests using his laptop connected via Ethernet. His machine ran Windows 10, and he used Speedtest.net, achieving up to 960 Mbps. I created an USB drive with the latest Ubuntu version and connected my PC to it. After booting Ubuntu, I ran Speedtest.net again and got around 960 Mbps as well. I'm wondering why Windows isn't allowing speeds higher than 200 Mbps. Here are my system details: Intel Core i7 4790K (haswell), ASUS Maximus VII Ranger motherboard, 16 GB DDR3 RAM, NVIDIA 1070 graphics card. No HDD remains; everything is now on an SSD. The computer uses direct Ethernet, no Wi-Fi or PLC. What have I tried so far? - Disabled Windows Defender - Removed and reinstalled the Ethernet driver - Applied power settings in high performance mode - Turned off antivirus - Changed network card speed from auto negotiation to 1 Gbps full duplex. Network equipment: Eurodoccsis 3.0 Telenet 10/100/100 managed ethernet switch (10/100/1000 ports). My PC is directly connected via Cat 5e to the modem. Other devices plugged into Eurodoccsis, Cat 6 cables to the switch, and Cat 5e to a Netgear access point also on 10/100/1000. Something in Windows seems to prevent speeds above 200 Mbps. I've watched some YouTube videos but none helped. Thanks!
In brief, testing under Linux confirms hardware capability, but Windows behaves differently—likely due to software or configuration issues. Consider running a speed test in a web browser or trying another browser. Have you checked if the Ethernet port reports gigabit speeds? Also, verify if QoS settings are active on your connection.
It's possible your ISP has an unusual setup. Adjust your network a bit and use the TCP Optimizer tool. Sometimes tweaking how TCP window works can make a big difference. I recall an instance where my ISP had a configuration or hardware issue causing tcp window scaling to slow things down instead of speeding them up. Reinstalling drivers or trying other automatic fixes might not help right now. In extreme cases, a cheap PCI-E LAN card could be a better option. If all else fails, it might be worth considering that you have no choice but to address the problem with your ISP.