So I've been having this random lag spike for the past few weeks already. I try contact my IPS and they all said that there is nothing wrong with my modem signal. I also monitor my network by using Task Manager as I play my game, it show that when I lag, the graph show a sharp jump then drop. I use a router but I also did try connecting to my modem directly which still won't solve the problem. I also just format and reinstall OS so that there won't be any unwanted application running. Anyone can help me?