i have e2200 2.2ghz dual core on a msi p6ngm2 motherboard with a stock cpu cooler. 450 watt psu, no video cards etc. my mobo Supports FSB up to 1333 MHz. default is at 200x11=2200. would like to get 2.5ghz . running 4gb 667 ddr2 single channel memory. is this possible? and if so, how? thanks in advanced.
Next stop should be a guide for your particular motherboard. Google is your friend.
Go through the guides. Then go into the BIOS and change the System Memory Multiplier (or whatever your BIOS calls it) from AUTO to 2.00, 2.00B, or 2.00D - whichever you need to set the Memory Frequency to twice the FSB. Then when you increase the FSB, the memory clock will rise in step with it. If you are at stock speed, your FSB should be 200 MHz and your memory clock should be at 400 MHz.
Read an overclocking guide and don't use the stock cooler. My E2200 on the spare machine runs pretty warm with the stock cooler when I stress test it. Then again it's in a case with only one case fan ^_^. But yeah, if you want to overclock use something better than the stock fan.
pentium dual core series dont actually require aftermarket cooler, if you have mobo with better stability and northbridge, temperatures are usually fine. I am OCing my E5200 to 4ghz on 1.4v and temps are almost same only 4,5 Celsius change in idle , full load is about same.