So I have a RX 480 that I recently purchased, since my R9 270X quit on me. I played GTA V, DOTA 2, Fallout 4 and some CSGO and everytime I turn on vsync or play borderless/fullscreen I am either getting laggy gameplay with different settings for different games. I have found that this is caused by hdmi scaling(underscanning) my Toshiba HDTV. Can you guys help me with this? Is there anyway around this? This didn't happen with my R9 270X.