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One question we won't know the answer to until the nMP is available is if there are turbo boost duration issues at play. It may be that we see turbo boost sustainability differences between the 4, 6, and 8 core CPUs for longer-duration tasks. Those differences will depend on the cooling and power limitations of the nMP specifically so cannot be inferred from other devices like the geekbench numbers are currently measured.
True, it seems to me though that the new Mac Pro is very much designed toward either focusing on the GPUs or the CPU, but probably not running both at full speed all the time; this is fair enough as there isn't a whole lot of reason to do this, since most workloads will need one more than the other. People trying to add up the Mac Pro's power requirements are finding there may be hard limits on this as well.

I'm hoping this means that when running something really CPU intensive, the CPU will be using the bulk of the cooling potential of the system, keeping it nice and cool. Likewise when doing something GPU intensive, either one or both will be using the thermal core. If you try to do something GPU and CPU intensive then there'll probably be a ceiling of power and heat, but in general you're unlikely to really do this except when running benchmarks or mining bitcoins or something.
 
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