This is why the AAPLJ90,1 Geekbench results make sense: the single-threaded performance on all but the 12-core is effectively identical, and the 6- and 8-core’s multithreaded results scale almost perfectly linearly with their respective core count despite an advertised 500 MHz base clock difference. Faster, the same TDP, and the same or larger cache, for a few hundred bucks more.) (The two red entries - the 6-core E5-1660 v2 and 8-core E5-2667 v2 - are not available in the new Mac Pro, but I wish they were. This is probably a more helpful way to compare: For instance, the 6-core’s increments are “(1/1/2/2/2/4)”, which means: The sequence begins with all cores active, then counts down to just one core active.
They indicate the number of extra 100 MHz increments by which the CPU may ramp up its speed with a given number of cores in an active, high-power state. Those weird Turbo Boost numbers, which are easy to pull from here and here, are worth understanding before choosing a modern Intel processor. It looks like you’re paying a lot for slower clock speeds as the cores increase, but that’s not the entire story.
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