i just bought a new samsung 40" 6300 series 6 led tv and the picture is amazing. when i watch blu ray though it seems like it lags or glitches. it's a 120hz, is there something i have to do turn it on. it's hooked up to my pc, but glitches on the ps3 as well. i have a nvidia 9500gt, would a top of the line graphic card help?