Overclocking may not make you rig faster. I would start by raising you CPU multiplier by a factor of one and run it to see if it's stable, OCing is a good cause of BSOD, had several. If so, back down on what you changed.
You will have to fiddle with the CPU and chipset voltages too.
There is an overclocking here at SF you can ask question, many are better than I am at it. Overclocking and Case Mods - Windows 7 Forums