Big thanks to NuckinFutz77. I've been trying to just run this board out-the-box and was kind of scared by the intermittent lockups. Increased Vcore to 1.3 and was able to do 5 complete 3dmark06 tests (with and without SLI), and play two games of COD4 all stable.

I guess I will start playing with oc in a few days. I think I will just enjoy stability at close to stock for a while.