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I want to build a very parallel (at least 24 cores) AMD opteron (bulldozer) system.

I'm looking at some motherboards and I can't figure out if they're UMA or NUMA (uniform memory access vs non-uniform memory access.)

Are most multi-socket motherboards one or the other architecture?

Here are two I was looking at:

Quad socket Tyan: http://www.newegg.com/Product/Product.aspx?Item=N82E16813151219

Dual socket Asus: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131643&Tpk=KGPR-D16

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This is not off-topic according to the faqs... Does someone want to explain why this question is not appropriate here? – Eloff Jan 23 at 17:36
The way I understand it, questions about servers by professionals for professional use are the exact domain of this website. – Eloff Jan 23 at 20:27
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closed as off topic by SvenW, Bill Weiss, Ward, Khaled, MDMarra Jan 23 at 14:21

Questions on Server Fault are expected to generally relate to servers, networking, or desktop infrastructure, within the scope defined in the faq.

1 Answer

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As far as I know, all AMD-headed stuff is NUMA. The "clue" you're asking for is checking the memory configuration - if some of the available memory banks are only usable if the second/third/forth CPU socket(s) are populated, you probably have a NUMA architecture.

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