From owner-freebsd-stable@FreeBSD.ORG  Fri Sep 24 18:16:56 2010
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From: Bryce <bryce@bryce.net>
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Subject: Re: SuperMicro i7 (UP) - very slow performance
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Yay!  I have solved the problem....

I got a new BIOS from SuperMicro support, and it has resolved the
performance issues I was seeing.  I also no longer have to disable
Legacy USB.

Here's the new & improved times for buildworld && buildkernel (with -
j12).
19 minutes for world and kernel (with all modules) is not bad at all!

>>> World build started on Fri Sep 24 03:26:06 CDT 2010
>>> World build completed on Fri Sep 24 03:38:44 CDT 2010

>>> Kernel build for GENERIC started on Fri Sep 24 03:38:44 CDT 2010
>>> Kernel build for GENERIC completed on Fri Sep 24 03:44:47 CDT 2010

Thanks everyone for all the help & ideas...