I have a Asus rog GT AC2900. I had a splitter go bad that was put in by the ISP. They came out and fixed it and my 1 gig internet is back to normal. The problem now is that after I leave the living room of my apartment my wifi speed goes from maxed out on whatever device I run a speedtest on, to less than 30Mbps. I thought it had something to do with signal but when I changed the channel or messed with any setting and applied it I would get normal speed from all the rooms in the apartment for 20 minutes and then it would go back to 30Mbps. The even odder part is that router that I am given through the ISP works fine. I would use that one but it loses a lot of speed compared to what I was getting from the other router so I would rather figure out what is wrong with the AC2900 and use that than the default one.