New
#11
The Caviar Blacks aren't known for their utter silence and reviews have commented on that.
If you're downloading or something and you're hearing it writing perhaps once every second, that's normal. For that matter it could be doing the search indexing that's normal after fresh installs (assuming you didn't disable it).
Sort of depends on if you're truly hearing "clicking" or just the normal writing / activity sound.
Don't know that an immediate RMA is necessary. You might give it another day or two and see if it's indeed something like search indexing that just needs to die down.