Pencil trick effectiveness

paulip88

Senior member
Aug 15, 2000
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For those of you out there who would like to know:

Using the pencil trick, and several different varieties of lead, I was able to get my Duron 600 to 808, stable, but nothing more. (still ran cool at 35C)

Using the silver compound in the epoxy used for a window repair defogger kit, I am able to get 850 stable, which is one step above what I could get using the pencil trick.

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Please, no OC hints. My chip is a dud and I know it. Just wanted to share the info.
 

Enigma

Senior member
Oct 10, 1999
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I ran into same problem and used defogger kit as well. With pencil it would work for a while and become intermittent. No problems now and I'm getting 850 from a 600, plenty good for me.
 

Compellor

Senior member
Oct 1, 2000
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I managed to get my Duron 600 up to 867 MHz last night. Runs stable too, but a little hot (49 - 50 degrees idle). I've had no problems with the pencil trick (I can get the chip to post at 950 MHz). I'm using regular silicone thermal compound, spread very thinly over the core.
 

KurtD

Member
Aug 17, 2000
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I have my T-Bird 750 @ 900 stable (auto voltage setting). Runs between 43 - 48, but never higher. I could probably fool with the voltage and squeeze some more out, but it doesn't seem worth the few extra MHZ.
 

MikeHelvey

Member
Sep 7, 2000
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Very interesting. I'm supprised the defogger kit works better since the only requirement should be to maintain conductivity accross the bridges. Hmmmm. . .any PHDs out there who can explain the apparent improvement of an OCed chip based on the defogger over pencil?

Mike Helvey
 

Enigma

Senior member
Oct 10, 1999
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No phd, but BS in Mechanical Engineering, Think of how little material is deposited with pencil (check under magnifying glass) I'm surprised it works! Defogger kit is conductive paint and it covers like paint. (Under magnification it looks thick)
 

paulip88

Senior member
Aug 15, 2000
908
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The only reason that I can see why the defogger kit might work better is that perhaps the pencil only provides a borderline amount of current and perhaps a greater fluctuation in the current, which may lead to a slight bit of instablility.

I honestly don't know. Just know that it runs faster and more stable with the defogger stuff.
 

DarkMajiq

Diamond Member
Jun 11, 2000
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I'm probably going to be getting an Athlon pretty soon, and I'd like to know what sort of shops I should be checking out for this defrogger kit (car shops obviously, but just any old parts store or what?), and how much is it going to run me (about)?
 

Enigma

Senior member
Oct 10, 1999
652
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Autozone and Pepboys carries it, made by Loctite @ $7, toothpick was best for me.
 

Adde

Member
Dec 29, 1999
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When you draw a line with a pencil that is mainly made out of carbon wich has got very high resistance to the current(compared to let´s say copper, aluminium or silver) you will not get very good cunductivity, especially since the line is very thin and that produces even higher resistance.
Therefore the penciltrick is not very reliable.
 

celery550

Senior member
Jan 24, 2000
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I got my Duron 600 two months ago, grabbed the first pencil I saw and connected the dots, been running 1gig ever since.
:)
:)
 

Healey

Senior member
Jul 7, 2000
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I used the pencil rolling around in the desk drawer, works for me.

I seem to recall reading somewhere that the bridge conductivity only comes into play during boot up. So once it's running if you experience any problems, it's not due to the "pencil-trick" other than the usual probs you may encounter from oc'ing.
 

Vpham97

Senior member
Sep 15, 2000
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Any body seen this defogger at your the local Wal-mart? The manager there have no idea what I'm talking about. They usually don't.
 

MikeHelvey

Member
Sep 7, 2000
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Hehehe, a walmart manager would sware they don't have a cash regester if you asked. I had one tell me they don't, and never had, carry curio light kits. . . but I happened to see them while I was looking for something else. Go figure. Thanks for the thoughts on the pencil trick.

Does anyone know if the above message about the bridges only comming into play during boot up? That would make the situation more interesting if it is true.

Mike
 

paulip88

Senior member
Aug 15, 2000
908
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MikeHelvey,

It only makes sense that it comes into play during bootup. However, that certainly does not explain the improved reliability that I get when I switched from then pencil. Aside from that, I really don't know what to say.
 

sojin

Member
Sep 19, 2000
145
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window defrog kit from autozone? Made by Microsoft? along with WinME?
well, seriously -
any special cautions i need to aware?
need any heating to settle it?
is there a possible way to clean it up if i mess up with L1 bridges?

Thanks
 

Forgiven

Member
Oct 8, 2000
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I am running 1G with a Duron 600 with just an average pencil to unlock. The problem I see with the other solutions is that if you make a mistake it would be harder to erase and start over. I have done this with two 600's and they are bot 1G or greater with a standard coolermaster, artic silver and KT7 and one with raid.;)
 

saltyfrog

Junior Member
Oct 16, 2000
7
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Yep,
What do you guys think about that it is only needed at boot time,
anybody tryed to erase them or something when runing :)
that would solve the riddle :)
 

paulip88

Senior member
Aug 15, 2000
908
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saltyfrog,

If you can tell me how to erase them with my HSF fan on, I'll be happy to try.

Supposedly, the bridges affect which multipliers are availablefor use. Since the multiplier is determined at boot time, this suggests that this is the only time when the quality of the bridges is important. However, it does not explain why I can run @850 stable now, but only 808 stable with pencil.

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retarded answer for your personal amusement:



<< While I had my OCed Duron up and running, I removed the HSF and erased the pencil marks to see if it would affect stability. It crashed almost immediately. I think the bridges have something to do with the temperature too since the temp probe said on reboot it was really hot! >>

 

Strike

Member
Sep 29, 2000
76
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I used a pencil on my tbird800 and got it up to 1010. Need a better HSF to go higher. It took me 3 tries before I got it where my system would run stable above 800! When I did it the last time, I did use a magnifying glass to see better.

I bought a conductive micro-pen that is used for fixing traces on a board. It is a bit smaller than a .05 pencil. Since I am running OK between 950 and 1000, I think I am going to wait and see if stability decreases over time.

Has anyone else tried a conductive pen? ( micro seems the only way to go though )

Strike
 

saltyfrog

Junior Member
Oct 16, 2000
7
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paulip88,

HSFs come in different shapes and sizes, I used to use &quot;gesva&quot;, (a pot people are making
coffe in) filled with cold water for cpu cooling, and I could access briges, if they were
on Celeron, quite easily.


about this one:

<< While I had my OCed Duron up and running, I removed the HSF and erased the pencil marks to see if it would affect stability. It crashed almost immediately. I think the bridges have something to do with the temperature too since the temp probe said on reboot it was really hot! >>

that's rediquilous, removing a HSF on a running Duron, :D
no wonder it crashed in a few seconds, he was lucky he didn't burned it,
people say 5 sec. are enough to burn T-bird 900...

I don't think that thease are ereased briges that crashed the computer, it's just overheating.