Your Computer just serves the HD files to your Xbox 360 which then acutally decodes and plays the files. You can use any computer for that because all it really is doing is just reading the file and shooting it over the network to the 360. However what is a nice proof of concept is my old P3 1 gigahert PC playing 1080i HD content. No the computer is not powerful enough to play the 1080i media files, but a combination of Pure Video, and a 5950FX graphics card does give that old PC enough power to allow HD playback without dropping any frames, or using a bunch of CPU power. But yeh the 360 should have more than enough power to playback ALL HD content even HD-DVDs.
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Your Computer just serves the HD files to your Xbox 360 which then acutally decodes and plays the files. You can use any computer for that because all it really is doing is just reading the file and shooting it over the network to the 360. However what is a nice proof of concept is my old P3 1 gigahert PC playing 1080i HD content. No the computer is not powerful enough to play the 1080i media files, but a combination of Pure Video, and a 5950FX graphics card does give that old PC enough power to allow HD playback without dropping any frames, or using a bunch of CPU power. But yeh the 360 should have more than enough power to playback ALL HD content even HD-DVDs.