set your CPU multiplier to 45 and set the core voltage to 1.250. Try running Intel burn test for 20 mins. If you PC completes the test successfully and your CPU core temperature is below 90 degree, you have a stable overclock. If it BSODs, then you might need to increase you voltage in 0.025 increments. My advise is don't go beyond 1.2 Volts. Probably you can start with 1.050 core voltage and 40 muliplier. If it is stable, increse the multiplier to 4.1. if your PC BSODs, increse the core voltage by 0.025volts.