<p>You will need to populate all of the CPU sockets if you are filing all the DIMM slots.<br>
So yoy probably need more than one CPU<br>
On Jan 9, 2013 12:42 PM, "Jörg Saßmannshausen" <<a href="mailto:j.sassmannshausen@ucl.ac.uk">j.sassmannshausen@ucl.ac.uk</a>> wrote:<br>
><br>
> Dear all,<br>
><br>
> Happy New Year!<br>
><br>
> I was wondering whether people on the list here have some first hand<br>
> experiences with this. I have been asked to purchase a single machine with<br>
> around 500 GB of RAM. We would not need more than 8 cores here. The job simply<br>
> needs that much of memory (and even then it is running for 14 days).<br>
><br>
> Now, with that amount of memory used by a single core, I would have thought<br>
> that I need a fast memory interconnect, i.e. a high memory bandwidth. I was<br>
> thinking of getting an Intel Sandybridge CPU (maybe a E5-2650) for that<br>
> machine and get a motherboard with can cope with that amount of memory. Does<br>
> anybody happen to have some recommendations here or knows of potential<br>
> pitfalls?<br>
><br>
> Also, in a related problem, how would I set the kernel.shmmni, kernel.shmall<br>
> and kernel.shmmax values so I am not running out of memory handles here. I am<br>
> still confused by that.<br>
><br>
> Any kind of advice here is much appreciated. Given it is an expensive piece of<br>
> hardware we want to purchase I want to get it right.<br>
><br>
> All the best from a grey London<br>
><br>
> Jörg<br>
><br>
> --<br>
> *************************************************************<br>
> Jörg Saßmannshausen<br>
> University College London<br>
> Department of Chemistry<br>
> Gordon Street<br>
> London<br>
> WC1H 0AJ<br>
><br>
> email: <a href="mailto:j.sassmannshausen@ucl.ac.uk">j.sassmannshausen@ucl.ac.uk</a><br>
> web: <a href="http://sassy.formativ.net">http://sassy.formativ.net</a><br>
><br>
> Please avoid sending me Word or PowerPoint attachments.<br>
> See <a href="http://www.gnu.org/philosophy/no-word-attachments.html">http://www.gnu.org/philosophy/no-word-attachments.html</a><br>
><br>
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</p>