I have borrowed a 2GHz Core 2 Duo, 1GB Ram, NVidia 9400 to see how it would work as a media center. It cannot play back any of my iTunes HD videos smoothly. According to Apple... The following is required 2.0GHz Intel Core 2 Duo or faster processor is required to play HD video, an iTunes LP, or iTunes Extras from the iTunes Store 512MB of RAM; 1GB is required to play HD video, an iTunes LP, or iTunes Extras So what gives? I want to buy a new Mac Mini (2.53Ghz, 4GB Ram, 9400) but fear that the extra 533 MHz wont be enough. Some series, such as Battlestar Galactica HD is completely unwatchable.