I have a gaming computer in my room using ethernet. My house also has 2 iPhones and 1 laptop for my sister. Using speedtest.net on my gaming computer I get 27Mbps download speeds. After the wireless is on for an hour or so the speeds on every device in the house will change to 2Mbps download and below. The second I turn the wireless off on the back of my router and I run speedtest.net on my gaming computer I get 27Mbps back. For anyone that plays CS:GO my ping will change from 30-50 to 500-800 until I turn the wireless off. I have called my internet provider and exchanged my router with no results. This is Thursday and I have my internet provider coming out to test things on Monday. I just want to make sure this isn't a problem I can fix before they get here because I can't deal with this problem anymore.