I used vNB 1.81v for 503-505 FSB. I still have the stock NB HS on their with an 80MM fan blowing directly onto the NB hs and it's just barely warm to the touch, not hot at all. This setup is feeling extremely fast.

I did some more testing late last night with the 5:8 mem divider running the mems at 1617Mhz @ 6-5-5-15-1T tRC 62 505FSB and this was the fastest my setup has ever been. With these settings I was able to score 11m31s in SuperPI 32M, which beats my Q9450 32M world record by more than 12 seconds but once I opened up CPUZ a couple times and took the screenshot and pasted into paint the computer locked up before I could click save. I was NOT happy. It's Friday so I will be tweaking the hell out of this bios this weekend.