Download some form of cpu temp monitor, I use HWmonitor. Also, you want to get some kind of benchmark software. I suggest realbench for this. A lot of people like to torture test their cpu after the overclock but I find that if you can run 3-5 passes of realbench, your processor is fine. Basically, go into BIOS and up the frequency by one notch. If it starts, run thee benchmark. Let it finish. If it doesn't thats not good. If Windows doesn't start, up the voltage to the next number. For the 8320, the safe voltage limit is about 1.5. Up the voltages until windows starts. When the benchmark fails, and the voltagess are as high as you want to go, put the cpu multiplier back down to the last stable frequency. There are lots of guides out there. Right now I have my 8320 on stock voltage and 4.0 ghz, but it is very stable right now so I plan to try and get it to atleast 4.2. Best of luck!