oh and in response to your questions.
2) I believe the multiplier (eg. 0.67x on asus boards) is applied to your FSB voltage and the resulting voltage 0.67xVfsb = the Vfsb you want the cpu to see. So if you want the cpu to see a fsb termination voltage of 1.2 you'd do something like: 1.2/0.67...
I was able to push 4ghz at (probably dangerous) voltages. I posted more details here:
http://forums.anandtech.com/messageview.aspx?catid=28&threadid=2174531&enterthread=y
basically i was able to do 8x501 and ran it for ~40min before i decided to down clock again. I didn't attempt to get...