That isn't really the same as in this case where we're talking about the same generation of memory. DDR3-1333 at C7 versus DDR3-1866 at C7 will yield a large improvement. C7 DDR3 is available through at least DDR3-2000 speeds, so it's certainly possible to scale bandwidth a lot more than you're suggesting. It looks like you can even get DDR3-2000 @ C6 these days.
im interested in efficiency
right now the same speeds between thuban and SB is no where near the same results in memory tests. can BD jump that gap while still being on the same socket?
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