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General Volt Modding

post #1 of 8
Thread Starter 
Hey, i need some info on how to pencil the resisitors on a graphics card. I have a 7600GS AGP and am looking to vMod it. What i need to know is how exactly do you apply the pencil to the resistor? There's like 2 parts to it, so do i shade both parts? Do i just touch the pencil to the resistor, or do i shade it in dark and thick (apply a lot or a little graphite)? Also, with pencil: is it reversable? Thanks.

This is the card i am going to mod.
post #2 of 8
AFAIK You need to make it touch the resistors, and better with too much than too little, because if it somehow gets a push or so, it would lose contact.
And also AFAIK (again), the thinnest line on the "pencilled" stuff, determines how much resistance there is.
Confirmation anyone?
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#well
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post #3 of 8
Thread Starter 
Isn't there anyone else here who knows how to volt mod cards?
post #4 of 8
It's really simple. Just scribble over the surface of the resistor. The graphite will connect the two soldered ends of the resistor and will lower that resistor's resistance. There's really no way to know how "dark" it'll need to be, so just scribble as much as you can get on it without having a powder everywhere. Then test your voltage and if it's too high for your liking, gently blow over the top of the resistor to remove some of the graphite. If it's still too high, lightly touch the top of the resistor so some of the graphite goes onto your hand. It's completely trial and error, but once you get your desired voltage, cover it up with some scotch tape, re-check your voltage, and if it's still good, you're done.
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post #5 of 8
Here is an older thread

I have volt modded my Gainward 7900GT 512 and the results were amazing. Default core is 550MHz and I reached 782MHz. The mod for my card is just a very simple pencil over the resistor until the required voltage to core is needed. When volt modding cooling of the core is not the only issue needing to be addressed. The power supply for the video card will also get warm and various other chips which may need added cooling.

Always have a multimeter on hand.

VOLT MODDING IS ALWAYS DANGEROUS AND CAN DESTROY YOUR PARTS WITH EASE BE CAREFUL!
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post #6 of 8
Thread Starter 
I tried this mod here: http://mujweb.cz/Pocitace/oc-lab/PCB76AGP.JPG


I can't get my clocks any higher on either the core or the memory.

Edit: My 7600GS is the AGP model. Is that gonna harm my OCability?
post #7 of 8
It won't necessarily hurt overclockability, but since it's AGP, the board layout may be different, so you may not even be working with the right resistors. When you apply the graphite, do you monitor your GPU voltages? How high did you go, voltage-wise?
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post #8 of 8
Thread Starter 
Err.. No i haven't monitored the voltages lol.. I know this is dangerous, but i still have 30 days to return it so i'm not too worried. When i did apply graphite to these resistors, i noticed no change in temperatures, load or idle, nor any extra overclockability.

My OC on the thing so far is 500/375, stock is 420/275 (BFG OC, i think 275 for memory). Anything higher on the core causes it to freeze during game for one minute, then set the clock back to stock 420. Anything higher on the memory causes artifacts in simple graphic areas (non-polygons, just specks all over the place).

It's a handsome 100/100 OC, but it's still underperforming my 6600GT when it was OCed.

Is there anyone who can verify this volt mod? http://mujweb.cz/Pocitace/oc-lab/PCB76AGP.JPG
Or do you know of any working volt mods for the 7600GS AGP?

Thanks for you guys' help.

Edit: also, for the RAM mod in the link above, when it says "try R15, next R14," does that mean try R515 and if that doesn't work shade R514 ALSO? Or erase R515 and THEN do R514?
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