Here's the numbers I recorded on my setup.
GA-965P-DS3 Rev2
Tuniq 120 Cooler
XMS2 DDR-800 (5-5-5-12)
Note: This is with an Old school 3dfx PCI Video card, and doesn't take into account the added temp of current video cards.
These are all stable for 6 hours on Orthos.
fsb 350x9
vcore 1.3625
cpu-z: 161837
fsb 358x9
vcore 1.3975v
load temp: 52c
cpu-z: 162155
fsb 362x9
vcore 1.40625v (-1 notch?)
load temp: 54c
cpu-z: 162524
fsb 366x9
vcore 1.43750v
load temp: 55c
cpu-z: 162840
fsb 372x9
vcore 1.46875
load temp: 58c