L1 bridges unlocked ... how to UNDO?!

[Guest]

I unlocked my L1 bridges on my TB950 ... I've been having problems with my computer now - it won't boot up, freezes after checking the hard drive ... the monitor won't even come on (and I know there's nth wrong wtih it) ... I don't know what's going on, afraid I might have done a poor job on the L1 bridges ... looking to clean it off ... how?!
Any ideas on what may be wrong with my computer is also appreciated ...


fate is in your own hands ... but are your hands strong enough to control it?

 

[Guest]

some people use an eraser, some people use alcohol.

 

[Guest]

Hopefully you used a pencil. If you did, use a good eraser to clean it off, and then use a cotton swap with a little rubbing alcohol on it to give a final clean, let air dry.

 

[Guest]

i had to redue the unlocking process over several times , mostly cause im an idiot.
i used the epoxy.
each time regardless of how long the epoxy dried, a little rubbing alcohol took it right off and all was well.

dunno about the pencil though as i havent done it that way yet.
do you guys mean like a regular pencil ?

ive heard older softer leads but i saw a picture in an article here at toms and they used a special electricians pencil.

 

[Guest]

I am assuming that you have upped the voltage? When you overclock your CPU you need to give it extra voltage, if you don't give it enough then the computer may freeze just like you describe.

Anyways, to clean it off I'd use a (very) soft eraser. Make sure you get all traces of the lead (if that's what you used) off.

I Make sense half of the time...You just have to decide which half!

 

[Tempus]

Actually, the best thing to use is an electrically conductive pen that Tom used. They are hard to find on the net for sale, but somewhere Tom said where people can order them from.

- I don't write Tom's Hardware Guide, I just preach it"

 

[Guest]

Here is the real mccoy with a very good description of the pen and what it will do. <A HREF="http://www.web-tronics.com/webtronics/2200-mtp.html" target="_new">GO HERE!</A>About 14 bucks. I found this on the net and have not had any experience with it but I think it is what you are looking for.

 

[Guest]

Okay here's the best way to do the bridges. I've got my multiplier set with custom bridges so I know what I'm talking about. First DO NOT use a pencil! Pencil wears off over time, just like when you write something on paper. Get a conductive pen. You could get one over the internet, but I found one locally. (I live in a Canadian city <400k) Surely other cities have places that sell conductive pens. Then you take some tape and mask in each individual bridge. Then you pen it in with lots of solder/ink. After it drys remove the tape and do the next one. After you're done all 4 you may have to do a quick non-masked touch up to ensure that each bridge is covered and the tape didn't remove solder that you need. If you screw up and need to remove ink/solder scrape it off with a sharp knife of some sort. (eg. you may be shorting two bridges together) Most of the time scraping it off won't do enough so you'll need to use a solvent. Use a good amount of varsol or something like that to wipe it off. Regular alcohol does nothing to the solder/ink. Don't use something much more powerfull than varsol or you'll pull polish off the processor - not then end of the world but not optimal. I discovered this happened with lacour thinner.

 

[Guest]

So whats the best way to break the bridges to change the multiplier on the CPU because my motherboard doesn't have any jumpers for the multiplier settings

Theres never enough money to feed the poor but there is always enough to fight a war - HomerJSimpson

 

[Grizely1]

if you did it with a pencil just use the eraser. LoL

-----------------
"648kb is all the space anyone would ever need!"

Bill Gates, 1980s

 

[Guest]

There is no real need to do the L1s with the conductive pin. If you do it with a pencil, it works just fine, but if you are fearful of the pencil wearing off over time, there is an easy way to fix that. Connect the L1s and test the chip, once you have a satisfactory connection (the chip works at the speed you want), get some shipping tape (the clear stuff on the big rolls) and cut a small piece and slap it over the pencil marks. That seems to work just fine, and way they wont be able to run off to fairyland.

~enjoy


Those who do not know, speak. Those who are silent, know.

 

[Guest]

Well the best way is to have AMD do it at thier fab before you get it.

If you're going to do it this way you have to be willing to take the risk that you CPU won't work after. Take it to a jewelry store that does in house cutting/etching. Most places outsource so it may take some searching. I found the problem what was done to my processor was that the circular saw the guy used to cut the bridges had a wider blade than optimal. As a result the some of the studs got ground down to the surface of the ceramic. This was especially prevelent at first when the guy was getting the hang of it. If you recall Tom posted the multiplyer settings so that's where you get them. Check with them first so you can figure out if your L7s (voltage) need cutting. eg. to get 1.75 or 1.85 from 1.70 you just fill in 1 or 2 bridges.

Even with the "tape trick" I still think pencils suck, it's $10 for a conductive pen and then you can forget about it.