@Kevin_Z issue is solved. All (8) necessary installation cables was not connected to the socket and that's why I had only 100Mbps :) Once again thank you for your help.

@Kevin_Z I think also that this possibly is the root cause, I've already contacted provider and they'll check that. I'll let know what is the outcome, for now thank you for your help :)

@Kevin_Z I'll be able to post screens later today, but: I've MSI X470 gaming plus so it is capable of 1000Mbps. "What if you connect the Provider cable to the PC directly, will you negotiate...

Hi, so today I've bought Archer C6 router and from yesterday I should have 1Gbps internet from provider, but no matter what i try to setup in my router or network card i can't go beyond 100Mbps. I've...