SupremacyEinmal erklären bitte =P
Another feature is the ability to install an entire game disc onto the Xbox 360’s hard drive, which decreases loading times, and significantly reduces noise due to the game being read from the hard drive and not the louder disc drive. For most games this feature also reduces the amount of time spent reading the disc, therefore helping to extend the life-span of the optical drive mechanism.
http://en.wikipedia.org/wiki/Nxe#New_Xbox_Experience
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