Which system is the loudest/quietest?

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Seraphic_Sixaxis said:
@Khuutra- thats nice to know but i meant loading-wise, it seems this gen's handhelds make small tid-bits of noise from what i here, nothing wrong per se but just a small issue.

A game cart isn't going to make any noise. The PSP's UMD's on the other hand do make some noise, but nothing notable.