umm...
The BIOS and a mobi that supports overclocking maybe? Just keep increasing FSB clock, core clock and core voltage until it won't POST, then clear the CMOS and set it to the last settings it POSTed on, then stress test it with a program for about 8 hours to check it stable, I'd also advise setting the auto shut off to around 70 degrees C so if it gets too up when stress testing it will shut off leaving your components unharmed.
Got that?