For kicks I used chew's settings a few pages back, booted right into vista x64 at 3.8GHz Instant BSOD when I started prime though I was able to POST at 4GHz as well, that was too cool.

Currently running prime at stock speed but with NB and HT both at 2400. So far, so good. Not sure if I should play with the memory speed or not, I'm at 1333 7-7-7-18 1T. Just playing around right now.

My 955 has a VID of 1.35V. If I adjust CPU VDD voltage in the bios the VID changes in coretemp to whatever I set that at. Interesting.