[Simbelmynë]

Hardware "theory" incoming

So I have been looking at the best price performance. 2 cores per memory channel seems to be optimal. A cluster of 8350k connected with 20gb infiniband (used on ebay) therefore seems to be in a good spot.

Since CFD benchmarks of this sort is difficult to find I would like some help in theorizing the actual performance.

Setup1:

7820X + motherboard + cpu cooler + PSU

Setup2:

2 x (8350K + motherboard + cpu cooler + PSU + 20 GB/s infiniband adapter)

I assume all other hardware such as RAM etc is the same for both setups.

The price difference is about 250 Euro in favor of Setup2, where I live.

As soon as we wish to scale it up further, the difference becomes larger since Setup1 then also needs the infiniband adapters etc.

For this comparison let's assume that it will not be up-scaled.

How would two 8350k fare against a single 7820X?

and

How would three 8350k fare against one 7820X? (This is approximately the ratio that we have, money-wise, the extra RAM may degrade the price ratio though)

Finally, the 7820X may be overclocked, but the 8350K may probably not (since we use a really cheap micro ATX motherboard).