[Beowulf] General thoughts on Xeon 56xx versus E5 series?

Eugen Leitl eugen at leitl.org
Thu Sep 13 07:53:41 PDT 2012


On Thu, Sep 13, 2012 at 08:48:37AM -0600, Orion Poplawski wrote:

> It seems the question before us is core scaling versus raw MHz.  I've seen 
> many codes saturate the memory bandwidth before filling all of the cores and 
> it seems you have a trade off between MHz and cores these days at a given 
> price point.  But perhaps that doesn't even matter if you're memory bandwidth 
> limited anyways.

Apropos memory bottleneck, did everyone catch that Haswell has stacked
memory? AMD has pretty much to do the same with their APUs, so OpenCL
seems to have a pretty bright future in HPC.


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