Yea the first thing I check when I get in game is the bandwidth even though I haven't seen much difference in connection when I get below or above 4000kbps. I use a hard wired connection. Router connected to PS4 through a ethernet cable. I recently upgraded my router as well but I think the only change it was made was on the wifi from 2.4ghz to 5ghz. I haven't tried playing with WiFi since I got this new router but I don't think it'll improve anything so... I played about one week with WiFi ok bo4 still with the old router @ 2.4ghz WiFi and the numbers were pretty much the same. I also have the ps4 like 30 cm from.the router so really close.