eVGA 6600GT AGP Volt mod?

ha ul with past dead chipset...worst i've done? touched a 3.3 volt connection bare wire with the hard drive casing...instant power off...massive spark...metal melted :P
....man i was scared...

Quote:

Originally Posted by Nubius

Turn the dial while the computer is still on? I figured I'd just turn it a tad, power up, check it, power down, turn it a tad more...is it safe to turn it while the thing is on?

MSI in the future will have software adjust the VGPU and Vmem....wish eVGA would bust out a program like that, would be nice and helpful right about now.

Those voltage spots to read the 3D voltage and whatnot, look like silver rings...do they dip down into the board at all? Can't tell if I'm supposed to measure the outside edge or the innards, inwhich if it's the innard part it'd make me worried of the multimeter hitting the edge of the metal ring and sparking :/

If your testing the "voltage" not resistance, it is actually safer to do it while the computer is on because you can see what is happening on the meter. If you set the dial when the power is off you have no way to know for sure how much voltage your adding...which can be very....very....very bad!

Those two test points on the picture I posted go through the board and connect to capacitors on the other side. Those are the exact spots to measure the voltage. Each circle is connected to a different capacitor for 2D and 3D voltage. They both supply voltage for 2D and 3D so it doesn't matter which circle you measure the voltage at. If you measure the voltage at one circle, the voltage should be very close or the same at the other circle. There is not an inner circle or outer circle for this -------> O, the whole O can be measured at.

Here is how I test. I bought some alligator clips at Radio Shack. I connect one alligator clip to the black test probe on the meter. Make sure you cover the connection well with rubber cover on the alligator clip. Then I connect the alligator clip to the case of the computer some place out of the way. Because the case of the computer should be grounded.

Then I take small piece of shrink tubing and cover the red test probe, and shrink it so that only the very tip of the probe is left showing. That way you have less of a chance of shorting something out by accident with the probe.

In this case it really doesn't matter because your only touching a circle with nothing else close to it. I only covered my probe because sometimes I take measurements at other places which there is a risk of shorting something out.

Once I got the black probe connected I only have to hold the red test probe on the circle. I use my other hand to turn the dial with small screwdriver while I watch the DC voltage on the meter display going up.

Quote:

Originally Posted by DeltZ

answers are all in the BFG card topic

http://www.bentinck-cleeves.demon.co...20voltages.JPG

it's the 0.5565 kohm one..(i think...well...the one which has a empty resistor thing underneath...that controls Vmem and you can just shade that in,..

is it possible to solder a pot onto either end of that resistor? as a more permanent vmem mod?

and if so what value? 10k?

cheers