Hi, i have the linksys wrt400n simultaneously dual-band 2ghz or 5ghz router and for some reason i can not play any online games at all because of the lag. I have total of 4 people using the computers. 3 wired to router including me and 2 using wireless. Every time they use their laptops watching videos or downloading something, I cannot play games. I have went to the router settings and went to QOS to fix things and it still wouldn't work. I have Comcast cable. My ping hits up to 1500 ms + and it stays that way until they get off. I do not know what they are using that sucks up all my connection for gaming AND internet surfing. How can I fix this problem? my sister and I are the ones that play games and the others watch videos or web camming. If there is a way to lower their connection for wireless it would be awesome. Thanks!