becareful when alter bios setting.
and pentium 4 quite hot,
not so good for overclock.

normally just increase the base clock.
and here is a formula for you:
base clock x cpu multiplier = cpu clock.

before raise base clock, reduce the fsb:dram ratio first.

since it has very low base clock (100mhz), and either 130nm/180nm.
so didn't expect it can go that far.