Hi! Here same problem as @vscience … anyone solved? at 1st i also thinked about a Platform problem but seems not… same problem changing cable, ethernet adapter etc... ESET Internet Security installed (latest)
X570-E Gaming - Ryzen 3900X
NICs: Intel I211 Gigabit + Realtek 2.5GbE
If a run a speed test with iperf 3 i Always have full speed (but this could be due to protocol compression or other…) instead if i simply transfer something with SMB protocol or navigate on internet my connection drop under 10-20 Mbps after a random amount of time, resetting the NIC solve the problem only for a while