I honestly haven't been able to dig into this CPU and system much yet. I simply let the OC utility do the work, it went straight to a relatively stable 4.6 ghz, I put more vcore to stabilize, then upped the multi and upped vcore again to stabilize. We'll see how far it can go, I have some mediocre cooling on the system right now.
I found these to be good guides:
Sandy Bridge OC guide