It turns out that the pin mod for the e2180 chips is not worth doing because intel has made these chips with a FSB wall, meaning they can only be overclocked so far and current MB’s can easily reach the ‘wall’ that they have. Mine is around 335MHz for the FSB, so optimally I can reach 335x10=3350MHz for this particular chip, other have gone higher with better cooling, water, phase-change etc. have reached ~440Mhz.
By pin modding a chip there is one cavate, and that is whether or not the cpu can run at the higher FSB speed with the standard voltage the MB give the cpu when first setup. The way to get around that is to first raise the cpu voltage in the BIOS, then remove the chip and pin-mod it and reinstall the chip. BUT if you were to ever reset the BIOS or install a new bios, then the system may not start at all because the cpu voltage has also been reset.
If you have been able to run your system at 333*6, it may or may not actually be stable, you computer may seem fine but without some stress testing to be sure.
I cannot explain how MB manufacturers are able to make the cpu run with a faster FSB overclocking the CPU. They are telling it to run faster but at your own risk essentially. I’m pretty sure that Intel doesn’t warranty a CPU that has been overclocked.
AFAIK, everything that crossg said above is right.