I wasn't able to find anywhere that the ASROCK supports MultiCore Enhancement. I doubt it.
I just realized I'll need to upgrade to Windows Pro to get support for multiple physical processors. I think I'll get a $50 dvd for Windows 7 system builders disk.
Also trying to decide about memory. I think I'll get used ECC server memory - it is about $50 for 8 * 4gb. Or maybe I'll spring for $100 for 8*8 gb. It seems that ECC memory is basically much less likely to fail? I've had to replace memory in the past, it was a pain to diagnose - first to determine it was a memory problem, and then to isolate which of the sticks was the problem. The errors didn't show up always when I ran one stick. Anyway - I imagine it may be a nightmare to diagnose the isolate a bad stick of ram out of 8. Of course, new ram doesn't guarantee there wont be a problem, but to compare new non-ECC vs. used ECC: it seems that ECC may be the way to go?
Also, apparently ECC has very little if any performance hit:
http://www.techspot.com/news/57360-...on-ecc-memory-performance.html#commentsOffset