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Palit 8600GT pencil mod super n00b questions

post #1 of 2
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Ok, I have a few questions for a pencil mod on an 8600GT (well actuall about pencil mods in general)
Following this guide:
http://magicboxlive.blogspot.com/200...o3d-using.html

and watching this YT video:


In particular this picture:

So, looking at the above picture, obviously I pencil over the two resistors. Then I take my trusty multimeter out and....what?
Where should I stick the two multimeter prongs? Do I stick the red prong on the VGPU measure point and the on a ground point? (if so where would that be) or does the red go from the resistor and the black go to the VGPU measure?

Second question, once I've found the correct place to stick my prongs (lol) the reading on the multimeter is going to be resistance in ohms correct (looking at the YT video..)? So how do I convert this into how much volts my core and mem will be receiving? I didn't listen much in physics

Sorry for such n00bish questions.
Smirg
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Smirg
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post #2 of 2
I dont know if you found an answer yet, but here is a snip from a pencil mod for another card. All the principles are the same.

Core
1. Measure stock resistance with multimeter. Write down the stock resistance. This will be useful if you need to set your card back to factory settings.
2. Install card, turn on computer, and measure stock voltage with multimeter. (Touch the ground wire of your multimeter to the case and touch the probe to the contact point circled above). Write down the stock voltage.
3. Turn off the computer and remove the card and rub a pencil over the resistor circled above.
3a. Alternatively, install a 100K variable resistor at the point labeled New Resistor Here, with the other leg connect to ground. This resistor has 18 turns and is much easier to calibrate.
4. Test the resistance after the pencil mod using the multimeter.
4a. Alternatively, measure the new total resistance at the point Measure Total Resistance with the multimeter, with the other probe on ground.
5. The predicted voltage can be calculated by using the formula, V predicted = V stock * (R stock / R new)
6. Reinstall the card, check new voltage, and overclock.



Memory
1. Measure stock resistance with multimeter. Write down the stock resistance. This will be useful if you need to set your card back to factory settings.
2. Rub a pencil over the resistor circled above.
2a. Alternatively, install a 100K variable resistor at the point labeled New Resistor Here, with the other leg connect to ground. This resistor has 18 turns and is much easier to calibrate.
3. Test the resistance after the pencil mod using the multimeter.
3a. Alternatively, measure the new total resistance at the point Measure Total Resistance with the multimeter, with the other probe on ground.
4. The predicted voltage can be calculated by using the formula, V predicted = V stock * (R stock / R new). Assume that V stock is 2.0V for memory, and do now allow V predicted to exceed 2.1V
5. Reinstall the card and overclock.
Lola
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Lola
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Charlestown
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