Al lyou need to do is set CPU votlage to 1.35v, then up multi, one at a time, booting into windows each time. If your CPU fails to hit the 45 multi, then you might want to enable PLL overvoltage. I recommend not using that option, however.
When you hit 45, then back down the voltage 0.025v at a time until you are no longer stable. Then go back up in voltage, while fine tuning for the exact voltage needed.
Should only take a couple of hours at MOST.