Best CPU for neural networks: 4 fast cores vs 6 slow cores

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Roberto
Roberto 2017-1-20
评论： Walter Roberson 2017-1-23
Long story short:
for an intensive use of neural network toolbox in matlab what is best choice?
1. Intel Core i7 7700k, 4 cores @4.5ghz
2. Intel Core i7 6800k, 6 cores @3.6ghz
Thanks
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Roberto
Roberto 2017-1-20
Yes, I will consider it for sure for deep networks, but still I need to know the performance of neural network toolbox with those CPUs. Any info about that?

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Walter Roberson
Walter Roberson 2017-1-20
Looking at
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-6800K+%40+3.40GHz&id=2785 6800 @ 3.4 GHz: 13569 CpuMarks
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-7700K+%40+4.20GHz&id=2874 7700 @ 4.2 GHz: 12277 CpuMarks
If we assume linear scaling with clock rate, then
6800 @ 3.6 GHz (3.6/3.4) * 13569 would be about 14367 CpuMarks
7700 @ 4.5 GHz (4.5/4.2) * 12277 would be about 13153 CpuMarks
so the 7700 system would be expected to be slower.
However, the 7700 CPU would be less expensive at current prices, and consume less energy. Also, the 7700 would be faster per core, by nearly a third, so for tasks that cannot be easily parallelized, it would be faster.
You would probably need to pay attention to memory speeds; the 3.6 GHz is quite a comfortable range these days, lots of support for that range, but the 4.5 GHz might require different memory chips to serve efficiently.
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Roberto
Roberto 2017-1-23
Not sure to understand. Do you mean here? You're suggesting to open a thread asking people to run some code and post the computation time with their configuration?
Walter Roberson
Walter Roberson 2017-1-23
You could post it on this thread. You are getting a fair number of views, even if I have been the only one commenting so far.

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