I previously had cat5 from my router in the garage run through my house to my room. I then have that go into a gigabit switch, which goes to the computers throughout the room. Now that I have put in CAT6 into the room, I have been having problems, including one being that the connection was actually bottle-necked to 100mbps(when I checked via ethernet card status). I fixed this by just using a normal cat5 cable to the switch to my computer. Now the problem I face is that from the same location as my computer, my phone gets a faster speed on wifi than the ethernet itself. I have no idea why this would happen since cat6 should be considered a faster cable, right? If I wanted to fix this, would I just want to rerun from the wall port to the switch with cat5e cables?
EDIT: I also have recently got a new router, which is the ASUS RT-AC5300 along with the cable change in my room. If this may have effected it, please feel free to let me know:)