Could someone give me a step by step guide on overclocking it. I am new to this so I don't want to mess up. Can I still use the stock cooler after overclocking it? Basically I am planning to buy a Nvidia Geforce 250 GTS 1GB and don't want it to fry up my computer. It has 4GB DDR3.
Go through the guides. Then take your core voltage off Auto and set your memory voltage to factory recommended values. Change the System Memory Multiplier (or whatever your BIOS calls it) from AUTO to 4.0 (DDR3) - whichever you need to set the Memory Frequency to four times the FSB. Then when you increase the FSB, the memory clock will rise in in proportion with it. At an FSB of 200 MHz, your memory clock should be at 800 MHz. Any more than DDR3-1333 will be wasted.
Download CPU-Z to check your FSB:RAM ratio. It should be a 1:1 ratio.
Your relatively low VID indicates that you have a quite nice chip. Keep your CPU voltage under 1.45 volts and your load temps under 70 C.