eVGA 6600GT AGP Volt mod?

[Nubius]

If your gonna do this you really should have better cooling then the stock heatsink.

yeah I only plan on doing this after I get water cooling for the card...won't be for another 3 weeks probably, but I want to have my info down long before then.

DONT USE A FREAKING RHEOSTAT. Use a 10K trimmer, jjust like every other mod. WTF is this rheostat stuff, you need at least a 15 turn cermet trimmer for this mod....

I was under the impression we were just talking about a 10k ohm variable resistor...which I hardly know anything about honestly.

Make sure before you turn the computer on you measure the resistance at the place with the white arrow to ground.

How do you measure it without power going through the card? I thought it had to have power going to it? I'm assuming when you say this I can put the hot lead from the multimeter on that solder point the white arrow is pointing at, and the black at a ground point and it'll read it even with no power or something?

Also in that blown up pic, are you just pointing out with the red arrow that that's where that solder point to the left leads to?

Just making sure I got it clear, I need to solder the wire to that solder point with the white arrow pointing to it, and not that tiny ass leg of that chip that has the red arrow pointing?

[crull]

yeah I only plan on doing this after I get water cooling for the card...won't be for another 3 weeks probably, but I want to have my info down long before then.

I was under the impression we were just talking about a 10k ohm variable resistor...which I hardly know anything about honestly.

How do you measure it without power going through the card? I thought it had to have power going to it? I'm assuming when you say this I can put the hot lead from the multimeter on that solder point the white arrow is pointing at, and the black at a ground point and it'll read it even with no power or something?


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You don't measure resistance with power on. You measure the resistance with an Ohm meter before you turn the power on to get a reading of the starting resistance. This is for safety, in case you connected something wrong or have the rheostat or trimmer set too low. Once your sure you have the correct resistance then you can turn the power on.

Change the setting on the meter to DC volts and you measure the voltage. Then you turn the rheostat, dimmer, trimmer, variable resistor whatever you want to call it down. They all do the same exact thing. While you are measuring the voltage you lower the resistance on the rheostat or trimmer... until the voltage you want is shown on the meter display.

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Also in that blown up pic, are you just pointing out with the red arrow that that's where that solder point to the left leads to?

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Yes, if you mean the small red arrow that is on the square chip. The white arrow and red arrow are technically the same place. They are connected by a circuit trace on the video card. It is easier to solder where the white arrow is though. If you try soldering to the chip you might damaged the chip, get solder on the other pins..etc etc. So solder at the white arrow.

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Just making sure I got it clear, I need to solder the wire to that solder point with the white arrow pointing to it, and not that tiny ass leg of that chip that has the red arrow pointing?

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You could solder to the leg on that chip, but your better off using the white arrow location instead. Less chance of having any problems.


**CaTalyst.X is right about using a trimmer if you can find one easy enough.**

It makes the mod safer because you have 20-25 turns of the dial to work with. This makes it harder to set the resistance down too low which would ruin the video card.

Trimmer - Very precise and usually small variable resistor -2 connections

Rheostat - A variable resistor, not very precise - 2 connections

Potentiometer - A variable resistor, not very precise - 3 connections. If you only use two of the connections on it then it is considered a rheostat

Those are all considered variable resistors.

See if you can find a trimmer, I don't want to see you have any trouble.