I reach about 165mb/s with IPv4 and about 183mb/s with IPv6 instead of 250mb/s . I tested the ethernet cable on a laptop which reached speeds of about 265 mb/s. My PC uses a Asus ROG Strix b350-f gaming Motherboard. I activated 1Gbit full duplex.
Thanks for your help in advance !
Thanks for your help in advance !