I'm at the end of my wits now, so I'm open to any suggestions.
Starting position:
Ryzen 5900x
on said board
32 gigs
900W power supply
Fiber optic connection with 2 gig up/down
Private PC is connected to the network by cable
Work laptop is connected to the network via WIFI
What's happening since last week:
The PC that is connected to the LAN can no longer get a clean connection.
Symptoms:
Speed test (tried various): 1 gig down / 0 up (upload test aborts)
Login to various sites no longer works, i.e. I can browse a shop or forum, but when I log in it fails miserably (https issue?)
Gaming is no longer feasible (battle.net can't get a clean connect, in the game I'm kicked out after 2-3 minutes (connection to the server lost)
Even the Google search needs several refreshes before the jump to the result works
What I've tried so far:
Fiber Box:
Restart, back to factory settings -> no effect
Attached the work laptop to the router via cable -> works just fine. but its my work laptop so its connected via VPN.
Fiber Box is probably OK?
I have two Ethernet options on the board (Intel I211 Gigabit and Realtek PCIe 2.5gbE Family)
Tried it on both connections -> same symptoms
Then tested the usual cmd commands:
flushdns / registerdns / release / renew -> no effect
Of course, all drivers are brought up to date -> nothing
Then, as a counter-test, connect the PC via WIFI stick: works great. no problem
Also tried another Lan cable: no improvement
Optimistic as I was, I completely reinstalled Windows 10 yesterday -> doesn't help.
Made an Ubuntu USB Stick : same effects on linux
so I accepted my faith that both onboard adapters are broken. Though luck..
Next day I bought a new Intel Ethernet Adapter (PCIe), was all hopefull ..
guess what? still the same symptoms.
I didnt make any hardware changes prior to this glorious riddle..
Questions i've got so far:
Did I miss something?
Is it possible that the whole board is broken regarding ethernet connections?
Even with a new added adapter?
Thanks guys for reading. Whoever figures it out gets a cookie 🙂