Right now my clock is running at 4.5Ghz which is stable. However, It's receiving 1.4volts when it runs @ 4.5Ghz under turbo. My question is there a lower voltage that I can use? (I want to make the cpu last long as possible).
Power Supply Wattage: 850
CPU Cooling Method: Liquid Cooling
Overclocking on motherboard: P8Z68-V LE Atx board
Nobody can tell you that, every processor is different. What you need to do is repeatedly lower the voltage and stress test your rig, 8 hours in Prime95 is sufficient. Once you start getting errors start working your way back up one step at a time until you no longer get errors. You have now found your minimum stable voltage.