This is the first computer I've tried overclocking so I don't know too much about it (overclocking), even after doing some research on the subject. The voltages listed below I got from some forum post I found on a google search but they seem to work well. The CPU is a Core i7 920 running at 3.81ghz. ASUS P6TD Deluxe motherboard. These are my temps after two hours in Prime95. Using the following settings: Code: Ai Overclock Tuner => Manual Intel Speed Step Tech => Disabled Intel Turbo Tech => Disabled CPU Ratio => Auto BCLK Freq => 191 (= 3810 MHz) PCIE Freq => 100 DRAM Freq => DDR3-15xxMHz UCLK Freq => Auto QPI Link Data Rate => Auto Voltages ----------- CPU Voltage => 1.25 CPU PLL Voltage => 1.80 QPI/DRAM Core Voltage => 1.25 DRAM Bus Voltage => 1.64 CPU Differential Amplitude => 800mV all other voltages to Auto Would it be safe to assume that I should be able to do 4ghz without much trouble or heat increase? It's only 190mhz more. Also, what is considered an acceptable temperature for maximum CPU load? I'm also concerned about the life of the chip if overclocking it is going to shorten that life considerably.