I recently got a new PC, and temporarily moved the old one into a room with no ethernet. It connects to my 4+ years old Archer C1200 wirelessly over 5GHz on ano

I recently got a new PC, and temporarily moved the old one into a room with no ethernet. It connects to my 4+ years old Archer C1200 wirelessly over 5GHz on another floor in a diagonal room, and speedtest gives 3ms ping, 180Mbps down/164Mbps up. I have a lot of WiFi devices, but this is a single family residence.