512 processora is what I've been led to believe. But this is entirely dependant
upon the hardware in use. Performance doea increase linearly at low core counts
(2 cores are twice as fast as 1 core, 4 cores are twice as fast as 2 cores). But
at what number of cores does performance flatten? For example, is performance at
512 cores no better than 128 cores due to things like memory access contention?
Anyone have the resources to check this out?

I could theoretically spend $37k for a 64 core machine or would $10k for a 32
core machine be better if the 64 core machine isn't actually twice as fast?

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