The only way to overclock that board is by changing the FSB. You can do that in two ways: using a program called CPUCool or by using an Unoffical "overclocking" bios.
For more info, go <A HREF="http://forum.ocworkbench.com/ocwbcgi/ultimatebb.cgi?ubb=get_topic&f=4&t=000697" target="_new">here</A>.
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