I have mac mini late 2009. 2.26 and 2g ram I have a bunch of 720p MKV files. I have my mini connected with HDMI to my 54" Panasonic 1080p. I set the resolution on the mini to 1080 and I play my MKV files... When I set my resolution on my computer to 720p the movie takes up almost the full screen before i select full screen mode. When I set the computer resolution to 1080p and play the 720p media the movie screen only takes up about 3/4 of the screen until i set to full screen mode. Do I lose any quality or get extra quality having my mini res at 1080p but playing 720p media? Is the NVIDIA geforce capable of upscaling 720p to 1080?