
PSA: Intel I226-V 2.5GbE on Raptor Lake Motherboards Has a Connection Drop Issue: No Fix Available
The Intel Ethernet i226-V onboard 2.5 GbE controller appears to have a design flaw that causes the Ethernet connection to drop at random times for a few seconds. The I226-V is the latest version of Intel's cost-effective 2.5 Gbps Ethernet networking chips meant for PC motherboards with chipsets...
RTL8125(recent 2.5 nic comes with 8125 instead of 8125b) or RTL8125B is the only way. They are not perfect but pretty much better than Intel's. There is no other way if you want to use 2.5gb nic except 10gb.