I have my Q9450 running Prime95v256-stable @ 3.5GHz with a lesser P35-DS3R-board, settings:
vcore: 1.375V -> drop to 1.28V under 100% load, w a better board you can set a lower vcore as drop will be lower
fsb: +0.2V over default
mch:+0.2V over defailt
pcie: +0.1V over default, locked att 100MHz
fsb: 438MHz(default multiplier x8)
memory multiplier: x2.5(4:5-ratio) -> 1095MHz
vdimm: 2.1V
I have C1E, TM2 and EIST all enabled to save energy.
I use a Thermalright Ultra-120-Extreme to cool the cpu. It needs more lapping and I need some arctic silver as I was out of mine and had to use cheaper thermal paste I had at home. So, clocks may improve. It is stable above 3.6GHz as well, but right now it gets to hot on one of the cores at that frequency so I can´t use higher than 3.5GHz for 24/7, something more lapping and better thermal paste may fix.
I also have 3 low speed 120-mm fans blowing in the case, one from the side of the case blowing at the motherboards northbridge, which is almost necessary at 100% load as the northbridge heat up much. And one additional 120mm fan on the cpu-cooler, for a total of four fans. All fans are controlled by the motherboards automatic fan control which works well, near absolute silent during normal Windows operation and speeds up nicely during load ie in Prime or heavy gaming.
Your results may vary according to numerous factors, but I think it will be no problem for you to aproximately duplicate my clock, as long as you have a good cpu cooler and decent airflow in the case
