First of all, let me say that I've been running League of Legends at lowest settings on an old Dell Vostro 1520. My ping has always been anywhere from 94 - 106, about. This is playable.
I got an Asus ROG G750J. When I play League of Legends, my ping is steadily at 150-220, which is essentially unplayable. I am sitting where I always have, nothing has changed, and if I pull up my old laptop, I have good ping again.
This is not the ISP's fault. Ethernet connection yields steady 93 ping. I've been using wireless on the vostro and the rog.
I have no idea what the issue is. I have League set to high priority, I have nothing running in the background, I don't have virus protection software and I don't have Asus Live Download, or whatever it's called.
Can somebody please help me so I can play games again?