Opening of L3, L4 and L6 Bridges

[Luie]

I am having difficulties with opening the "L" Bridges. I have no problem at close them (with a pencil) but opening them, I don't have a clue on how you guy managed it....=(

I use a hobby knife to cut the bridges open but the bridges remain closed. How do you guys do it? Am I doing it right?

[UnseenMenace]

You can use a craft knife to open bridges, however it must be exceptionally sharp and reasonable pressure must be applied. Although I am not sure why anyone would need to open the L3, L4 and L6 Bridges.. care to enlighten me

[Luie]

The reason I need to open the bridges is that my motherboard's bios doesn't change the multiplier or the fsb. The only way for me to oc is to alter the bridges.

ie. open some bridges and close some others.

Thanks for the advice.

Btw, is there any other methods? I'd tried it with a sharp blade but I still couldn't open the bridges. Had anyone succeeded in opening a bridge?

[UnseenMenace]

A local jewelry shop or watchmakers should have the tools to do the job, you could possibly try this route if they do not charge a lot

[Luie]

"Depending on the configuration you intend to perform, you’ll see that besides making some contacts, you’ll need to break some existing ones. There are basically two options to break one of those tiny contacts. The most obvious is using a surgical knife and a magnifying glass and severing the path. The second and safer option is to take the processor out of the motherboard and short the contacts, breaking the tiny fuse. You can well do it with a 9V battery (yes, that small squared one), connecting a wire to each battery terminal and touching with both battery wires both ends of the contact you want to break. A even safer and more precise way to perform this operation is by using the tips of a multimeter. take off the tips from multimeter and connect them to each battery terminal. Use then the tips to break the desired fuse, by connecting each tip to the terminals of the fuse to be burned."

Is the battery short true and successful to anyone? It doesn't work for me...

[SickBoy]

Forgive me for saying this, but that seems inherently very risky and crazy if you ask me.... especially if you're modding a nice chip. The 1.2 GHz+ chips, no matter how far they've dropped in recent weeks, still cost enough to sting when you unintentionally kill one...

Maybe you could try the cutoff wheel of a Dremel? I don't know if that's fine enough but it seems to me like it would work.

SickBoy

[Luie]

My chip is only a cheap AMD 750Mhz. Now only cost HKD$350.
I would probably try all those methods and see which works best.

[Ploaf]

Originally posted by SickBoy
Forgive me for saying this, but that seems inherently very risky and crazy if you ask me....
Maybe you could try the cutoff wheel of a Dremel? I don't know if that's fine enough but it seems to me like it would work.

That's exactly how I did mine-Duron800. It was ugly and I barely got it to work afterward because the contacts were almost completely gone by the time I was done so fair warning. The cutting wheel vibrated too much and it was all over the place, relatively speaking. A diamond bit has been acquired for the dremel so that it can make the cut much quicker and hopefully cleaner than the cutting wheel the next time I have to try it. The ceramic does a wonderful job of protecting the bridges and you need something very hard to cut through them.