So I built my computer just this last summer with the cm690 case and never left stock cooling. Ive recently upgraded to an Antec 1200 and a Zalman 9900 cpu fan. The only over clocking ive done was increasing the cpu frequency to 220.
So right now the cpu is showing 3.520 Ghz and it idles at 26C. Overclocking is really new to me and i really want to get the most out of this computer. So im not really sure what all i need to adjust. I know i can go alot higher with my cooling.
Heres what ive got:
Amd phenom II x4 955 BE
CORSAIR XMS3 DHX 1600 4GB
Corsair 750 watt psu
2 sapphire hd 4890's
press f1 in the bios, this will unlock the more advanced features. you will be able to select the multiplier and raise it. i would estimate that you could raise it +2 before you need to up the voltage. if you want more speed, you will need to up the voltage.
warning, raising the voltage will increase power and heat along with a possibility of lowering the life of the cpu. pending on how much voltage, the life time can vary. i would not go above 1.4v.
the multiplier is good for large jumps in frequency, but the FSB/reference clock is good for fine tuning. just for safety, i would either increase the FSB by 4 or 5 or increase the multi by 1 and then do a 1 hour prime 95 test for stability and heat.