I'm building a rig for my brother with an Allendale E6400, Geil DDR2-1000 RAM, and a Tuniq Tower 120 heatsink. I want to overclock it as much as possible while maintaining stability. I've previously had good results with a DS3, E6400, and Zalman 9500 (3.4 Ghz Orthos stable), but I've also...