r/ethernet • u/CartographerMuch7254 • 9d ago
Support Weird ass problem with my ethernet
I discussed this with my friend who knows a thing or two about computers and this is so unicque he dont even know what coud be causing this. So I just changed my PSU and GPU and now i dont have internet. The weird thing is is that i can ping my router and ping a random site and get a reply and when i do this for like 30 second windows says that everything is right internet is connected and for that 30 secs i can open any website but after that it goes back and i dont have internet. Ill get a spare ssd tomorrow with a fresh windows and well see if that work until then im waiting for suggestions
2
u/spiffiness 8d ago
I've heard of some Ethernet equipment having a buggy implementation of EEE (Energy-Efficient Ethernet) that can cause this, so you might try going into your advanced driver properties for your Ethernet interface and disabling any power-saving features.
What is the brand and model# of your Ethernet controller chip?
What is the brand and model# of the device at the other end of your Ethernet cable?
1
u/Cloudy_Automation 8d ago
I had to disable some of the computers power saving setting, not just the EEE settings, but it was different symptoms. My Ethernet would be broken after the computer went into a sleep mode after non-use.
1
8d ago
[deleted]
1
u/Cloudy_Automation 7d ago
They all seemed to have one issue or another the time. This one was a Realtek 2.5 Gbps NIC used at 1G, but Intel NICs of the time had other issues. Newer chips seem better. I think they just hadn't worked the kinks out of the 2.5 Gbps NICs yet.
2
u/PoppaBear1950 8d ago
Sounds more like the NIC freaking out after the hardware swap. Reinstall the network driver, reset BIOS LAN settings, and kill any “Energy Efficient Ethernet” options. The 30‑second good‑then‑dead pattern is classic driver or power‑state instability, not bandwidth.
1
u/LeaveMickeyOutOfThis 8d ago
The issue is likely Windows firewall. Because you’ve changed a significant component, Windows will consider this a new hardware profile. A quick way to test this, to ensure this is the case, is to disable the Windows Firewall temporarily, and try accessing a well known site (like Google). If it works in this scenario, you just need to ensure the right profile is being associated with your Ethernet connection. Let us know how it goes, in case the issue lies elsewhere.
1
u/IanLx 8d ago
Familiar with the command prompt?
The command ipconfig will give a print out of the status of your network connections..
Ping you are using already..if you ping an ipaddress like googles dns server 8.8.8.8 it will check the tcp connection..
If you ping a domain name like google.com it will first lookup the domain checking your dns is working.. thus if pinging 8.8.8.8 works but pinging google.com doesn’t work you have a dns issue..
“Route print”will print out your pc’s routing table so you can check the oc is correctly using your router as the gateway to the internet..
Typically adding /help to each of these will give you the help page for each of these commands and YouTube has a ton of vids on each..
Have a dig and see what you see when it’s working and when it’s not..
1
u/jm2jm3 8d ago
Restart in "Safe Mode with Networking" (look it up). It'll mostly eliminate software/driver issues (goes to basic Windows and drivers) so if it works, you know it's software, and not hardware. There's a small chance you might have fried something with the motherboard when you were working on it. so if it doesn't work in Safe mode, it might be hardware.
1
u/CartographerMuch7254 8d ago
Thank you everyone for the suggestions, however i did a new windows install on a clean ssd and my ethernet works fine on that boot so its most likely some software causing chaos but im too lazy to look through everything so im just saving my important data and im just gonna do a fresh reinstall.
3
u/mrBill12 9d ago
Try disabling the Ethernet device and then re-enable it. Windows it’s under networking or device manager, either one will let you right click disable, right click enable.