I would be interested in seeing some proof that there is a difference, but my understanding is that the density only matters with compatibility, not speed. Older motherboards sometimes have problems seeing newer modules that are more dense.
Theoretically, it makes sense that higher densities would yield faster access, however I doubt this is actually true. Even if it is, the benefit would be very, very small.
Just my 2¢ ~cdogg
"The secret to creativity is knowing how to hide your sources."
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