Trying overclock my Socket A chip, how to CUT ???

[Vette73]

Anybody know how to Cut the bridges on the Duron chip? I have a couple of 1Ghz Durons I am trying to set at 9 instead of 10. That way I can run the chips at 133FSB. The chips will do 1.2 Ghz but can't handle 1.33.


I tried to cut them but its harder than ot looks


Thanks

 

[o1die]

You won't notice that much difference in speed. I would leave them alone. I once tried connecting the L1 bridges using super glue and a defogger kit, and got so much super glue on it, I thought it was a goner when I scrapped off the excess super glue, exposing some circuits underneath. I tossed it in the trash, then changed my mind later on. Put it back in with the default settings, and it ran fine.

 

[pdo]

cutting the bridge on the Durons and connecting is much easier then the Athlon XP. I have mod 2 Duron 1GHz to 9x multiplier using a sharp pen knife. It's really not that hard. But on my try with an XP it end it up in the For Sale and Trade forums.

Here's my Durons with a 133FSB..

 

[johncar]

Originally posted by: Marlin1975
Anybody know how to Cut the bridges on the Duron chip? I have a couple of 1Ghz Durons I am trying to set at 9 instead of 10. ........
I tried to cut them but its harder than ot looks
Thanks

Try the pointiest/narrowest angled tip diamond coated burr your dentist will give you...ours did. Epoxy into appropriate tube for manual use like a pencil.....writing the number one in place across the bridges with finger strokes, heel of hand planted firm. Like cutting thru butter. If you have cheapskate dentist, try hardware or hobby stores. Do not use power tool, too easy to skip around the surface. Use at least 5X eye loupe to magnify.
John C.

 

[johncar]

Got a simpler mod as long as you know you only want to reset 10X to 9X. Background...Duron Multipliers are set by 4 bit code with Bit Values of .5X, 1X, 2X, and 4X. From 5X thru 10.5X the Multipliers are set by Enabling/Setting HIs = 3X less than desired Multiplier.

So 10X gets set with .5X = LO, and 1X + 2X + 4X = 7X HI. All you have to do is Disable the 1X Bit Value by setting it LO...and you can do that by "cross-connecting" the "lower dots" of the .5X and 1X L1 bridges. This will pull the 1X signal from its default HI to .5X's default LO...new Sum of HIs = 6X so you'll get 9X.

L1 bridges from L to R = .5x, 1X, 2X, 4X...so connect the lower dots of the first 2 from the left. Lower dots because they are connected the signal busses, the uppers are not if the L1's are open.
John C.

 

[johncar]

Originally posted by: johncar
Got a simpler mod as long as you know you only want to reset 10X to 9X. Background...Duron Multipliers are set by 4 bit code with Bit Values of .5X, 1X, 2X, and 4X. From 5X thru 10.5X the Multipliers are set by Enabling/Setting HIs = 3X less than desired Multiplier.

So 10X gets set with .5X = LO, and 1X + 2X + 4X = 7X HI. All you have to do is Disable the 1X Bit Value by setting it LO...and you can do that by "cross-connecting" the "lower dots" of the .5X and 1X L1 bridges. This will pull the 1X signal from its default HI to .5X's default LO...new Sum of HIs = 6X so you'll get 9X.

L1 bridges from L to R = .5x, 1X, 2X, 4X...so connect the lower dots of the first 2 from the left. Lower dots because they are connected the signal busses, the uppers are not if the L1's are open.
John C.

Edit:- Shoot!! Forgot that the signal voltage on the .5X and 1X signal busses might not be near ground level, but might be 1/2 way in between ground and Vcore because each one has 1K resistor in its circuit...so the result might be "indeterminate", either LO or HI, not sure of either. But if you like this option, there is a way to be sure both signals will be at Ground level = LO...just continue the connecting conductive trace to triangular icon to the left which is at ground level. Then both signals will be interpreted as LOs. Sorry for the temporary mixup.

Multiplier decoding explanations and circuit diagrams at
http://www.beachlink.com/candjac/index.htm link to duron/Tbird article.
John C.

 

[pdo]

jeez John you really get complicated with this stuff. You can go here and check to see which bridge to cut and connect.

 

[johncar]

Yeah, you're right. But just knowing which bridges to cut or close doesn't get you to understand what's going on...but then understanding gets us to lose our marbles (hopefully only temporarily) and take 3 posts for an alternate suggestion.;-)

Well anyway, we answered the direct question about the best tool.
John C.