F5F Stay Refreshed Power Users Networks Why does my internet go fast sometimes and slow down right after?

Why does my internet go fast sometimes and slow down right after?

Why does my internet go fast sometimes and slow down right after?

N
NotLate4Dinner
Member
117
6 hours ago
#1
UPDATE: After hours of trying, I finally fixed the problem. If someone has a similar issue on Windows 10, open command prompt as admin and type in these commands one by one: netsh int tcp set global autotuninglevel=normal I hope this helps you get back to full speed faster than it took me. God bless.

Recently, after moving house, my PC stopped getting full gigabit ethernet speeds. I have gigabit internet with Virgin Media and checked the speeds using a laptop connected to the router. The test on the laptop went up immediately to around 900mbps and then reached 1000mbps. However, when I ran the speed tests on my PC through speedtest.net, the initial peak was only about 60mbps before slowly climbing to 450mbps. Even worse is that if I use the Windows app for speed testing, it jumps to around 80mbps and stays there.

I know my motherboard supports gigabit because at my last house with gigabit internet, my PC ran at full speed on both my laptop and PC without any issues. I checked both the router settings and the PC settings, and they all showed a gigabit connection. I thought maybe the ethernet port could have been damaged during shipping, so I tried plugging my phone into it using USB tethering. My phone got about 500-600mbps on wifi, so I expected seeing some speed spikes when testing through USB on my PC if the ethernet was bad. But the speed tests behaved exactly like when plugged via ethernet: starting at around 60mbps and slowly rising to about 300mbps on the website, or jumping straight to 80mbps in the Windows app.

So I can only assume something is interfering with my speeds at a software level, but I don't know what it could be. Before every test run, I made sure to turn off gigabit lite, disable gigabit, green ethernet, and energy efficient ethernet settings. Anyone else have any idea what might be causing this sudden weird behavior?
N
NotLate4Dinner
6 hours ago #1

UPDATE: After hours of trying, I finally fixed the problem. If someone has a similar issue on Windows 10, open command prompt as admin and type in these commands one by one: netsh int tcp set global autotuninglevel=normal I hope this helps you get back to full speed faster than it took me. God bless.

Recently, after moving house, my PC stopped getting full gigabit ethernet speeds. I have gigabit internet with Virgin Media and checked the speeds using a laptop connected to the router. The test on the laptop went up immediately to around 900mbps and then reached 1000mbps. However, when I ran the speed tests on my PC through speedtest.net, the initial peak was only about 60mbps before slowly climbing to 450mbps. Even worse is that if I use the Windows app for speed testing, it jumps to around 80mbps and stays there.

I know my motherboard supports gigabit because at my last house with gigabit internet, my PC ran at full speed on both my laptop and PC without any issues. I checked both the router settings and the PC settings, and they all showed a gigabit connection. I thought maybe the ethernet port could have been damaged during shipping, so I tried plugging my phone into it using USB tethering. My phone got about 500-600mbps on wifi, so I expected seeing some speed spikes when testing through USB on my PC if the ethernet was bad. But the speed tests behaved exactly like when plugged via ethernet: starting at around 60mbps and slowly rising to about 300mbps on the website, or jumping straight to 80mbps in the Windows app.

So I can only assume something is interfering with my speeds at a software level, but I don't know what it could be. Before every test run, I made sure to turn off gigabit lite, disable gigabit, green ethernet, and energy efficient ethernet settings. Anyone else have any idea what might be causing this sudden weird behavior?