[CentOS] Motherboards for HPC applications

Hello,
Can somebody recommend CentOS-OK, dual socket motherboards for compute
elements? A quick look up at Intel pages suggests they are thinking of
them as "server boards", but then they recommend them as "for SMB",
I'm somewhat puzzled about it.
It would be nice to know what MBs you are using, pros and cons.
Thank you in advance

-- 
Eduardo Grosclaude
Universidad Nacional del Comahue
Neuquen, Argentina