processor overheating, too large voltage

[darksabaton]

as it says on topic title it is the problem on my 2nd computer

as it seems a thing overclockers like to fiddle with alot i put it inside this forum.

it has P4 3.0 ghz and an older but compatible motherboard.

i have the same processor in this computer but the differance is simply too great

on default the max voltage should be about 1.3V as is the case on my first pc, yet on 2nd pc the voltage is set on 1.6V!?

i lowered the mhz thing that sets how fast the processor should work from the "default" 132 to 100 and that lowered the temperature from 75c to 68c. but per default on P4 3.0ghz it should be set on 200 as to work properly on 3.0ghz. yet when i set it on 200 the pc doesnt even boot. my first pc has it set on 200.

now the problem is i have to lower that voltage somehow that doesnt involve software solution and i cannot change it in bios becouse i simply dont have the option there.

as soon as i start loading windows it crashes with a split second bluescreen and restarts.

power supply, thermal paste, hdd, gfx, ram, cooler vent arent responsible as i replaced power supply, thermal paste, gfx and ram. and turned off hdd. while vent works fine and cooler is cleaned.

but still too high temp. and 1.6V?

i dont know how to but it seems my only option is manualy lowering the voltage that doesnt involve software solution since i cannot start windows.

im not a computer wizard but if my motherboard or processor went to 9 hells i wouldnt be even able to boot would i?