It's been quite some time since I've done any sort of overclocking, but the last time I did (around the time of the Celeron 300A (woohoo! 150% overclocking FTW!), if I recall correctly) I remember having to use DIP switches and jumpers to set it up. I seem to recall having dabbled a bit later on down the line with some BIOS-based overclocking, which was ridiculously easier than fiddling with the switches and all, but I just wanted to point out that overclocking isn't necessarily ALWAYS done through software.[...] even though overclocking is always done through software (bios).