from my understanding...
all intel chipset is produce in one speed, which is the highest that family can goes.

before they market it out they simply lock it to certain speed.
i even heard one time got ppl buy celeron n unlock it to pentium...

anyone know how to unlock pentium 4 2.8G? it is not overclocking.

unlock what?
multiplier?
L2 cache?

not sure....
i think everything..

it is like u turn it into a pentium 4 2.8G->3Ghz.

it is not like overclocking.coz this one i heard got ppl selling celeron chip
with P4 speed.

i don't think you can "unlock" or increase/decrease the multiplier of an Intel's processor unless it's an Engineering Sample ,and there is no way you can turn a Celeron to a Pentium processor as well.

But, if you want to overclock it, it can be done by increasing the front-side-bus (fsb).

Eg. processor with the speed of 2800MHz (2.8GHz) = 200 (fsb) * 14 (locked multiplier)
you can increase the fsb to 250 which will bring you to the speed of 250*14 = 3500MHz (3.5GHz)

Overclocking will increased the processor's speed but it won't change the cache of that processor.

Evogenix

i think maybe it is intel internal tool to lock n unlock it....
well...just incase any one can verify such story plz do speak out. thks.

yes u can change the multiplier with newer Pentium 4 that features EIST. mobo like ASUS P5WD2 have a feature called "ASUS CPU lock free" which enable you to manipulate the EIST feature of the processor and allow you to adjust the multiplier to 14.

but to unlock a Pentium 4 proc is impossible....so stop asking.

This post has been edited by Shah81: May 9 2006, 05:30 PM

honestly i ever heard bout that....
but the conclusion is all the testing were failed.....

only pentium EE and ES are unlock rite?

here:

http://www.xtremesystems.org/forums/showthread.php?t=69913

that's not unlocking a P4. that is just a pin mod to change the boot strap so the proc will be detected as a 1066MHz fsb proc. that guy do it that way because there is no OC features on a Dell mobo to increase the FSB.

but to unlock the multiplier of a Pentium 4 that is lock by default at factory is totally impossible....so stop asking.

If your question is answered here correctly, thats the end for Pentium 4 3.0. Or even pentium themself.