I've got 2 kids who play games online with an xbox one and a PS4 and they keep complaining that their connection is laggy. I have bought a wifi range extender but it is still not good unless all the doors between the router and the games room are left open!
A speed test gave my download speed at 37.41mb/s and an upload speed of 6.30 mb/s.
Re: Can I upgrade my router to improve online gaming?
Yes its called Modem Mode.
I use this and have not had a problem for over 4 years. I use the ASUS RT-N66U.
Its now 3 years old, but works the same as day 1, could not be Happier.
-- Red (VM SH2 AC Beta tester) Running on 200Mb VM service with SH2 AC in Modem Mode, with a ASUS RT-N66U router. With this setup I get Fantastic WIRED and WIRELESS Signals in my home. I dont work for VM. But I work in IT, and I know my tech. My advice is at your own risk.