I found overclocking the Core 2 processor pretty easy, but then again I wasn't going for extreme FSB or memory performance.
I was able to overclock my Q6600 G0 to 3.6Ghz on the stock intel cooler without adding much voltage. I always lowered memory clocks to take that subsystem as a whole out of the stability equasion.
Running a stabilty test on
all cores afterwards at least for a few hours worked pretty good.
After a while some extra vcore was needed but to get from 3.6ghz to 3.7ghz needed a whole lot more. This is the turning point.
When temps exceed 65°C it's pretty much the end of the line.
4Ghz on air for a Wolfdale is a good possibilty. A half decent chip will already do that.
Also take care of the northbridge on the board, these can get hot as well and are prone to stability issues when too hot.
Have fun
