I think you have all info in users manual that came with your board...
Here is great info too: http://support.asus.com/download/dow...n-us&model=P5E
...btw, I started to learn about Ocing almost two years ago, and I still am...and nowdays see many guys that want to OC, and write about it in their first post, without any read, just ramp the FSB...lol I admire their courage...
CPU Spread Spectrum
PCIE Spread Spectrum
CPU TM Function
Execute Disable Bit
Max CPUID Value Limit