I have a 500mb/s download and upload fiber optic internet plan. I connected my computer to my gigabit router directly with a cat6 ethernet cable. I get a stable 470mb/s but when I try to watch youtube videos in 1080p or HD twitch streams, I still lag. Whenever I lag, I go straight to speedtest.net to see if my internet speed drops, but it is still at 470mb/s. Anyone know whats going on? Is it problems with my router settings or what?