May be a strange question and I may be asking for more than expected, but I had always assumed that when I switched to Mac the quality of video playback from sites would be quite clear and sharp, not always, but mainly so, and yet a lot of video is quite pixelated and blurry, not constantly but with movement it pixelates briefly then settles and repeats etc. Is this an i5 thing and i7 would give a better result or am I just configured wrongly. It's no biggie but wondered if the i7 is a lot better or settings can improve those things.