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The voltage for the G80 GPU and GDDR3 memory can be read out at the following places:  You might find it to risky to read voltages at those places, if you slip you might indeed damage your brand new VGA card. Therefore we soldered 2 wires on our card which are much easier to touch during our overclocking article. We used a small tip of glue so that the wires stay in place, this might avoid accidentally contacts between each wire.  GPU Voltage Modding  For the GPU core voltage mod we must search for the Primarion PX3540 PWM IC. The resistor marked in blue is the one you need to shade with your B2 pencil. Strike it a few times and measure how the resistance changed, you can check resistance by holding the red wire of your multimeter to the red point and the black wire of your multimeter to the pink point. The stock resistance measures around 35 Ohm, this is very low and this will make it very hard to pencil mod the GPU core voltage, we recommend doing the soldered modification. For the solder mod we used a 1kOhm adjustable resistor (often called VR) and soldered it between the red and pink point. This changed our stock voltage from 1.3V to 1.33V. To further increase voltage we must lower the resistance of the variable resistor, before you power on your system always make sure that your VR is set to highest value. For 1,4V we adjusted the stock resistance of 35 Ohm to 29 Ohm. MEM Voltage Modding  For the MEM voltage mod we must search for the ISL6549PWM IC. The resistor marked in blue is the one you need to shade with your B2 pencil. Strike it a few times and measure how the resistance changed, you can check resistance by holding the red wire of your multimeter to the red point and the black wire of your multimeter to the pink point. The stock resistance measures around 536 Ohm. For the solder mod we used a 20kOhm adjustable resistor and soldered it between the red and pink point. Doing this changed the voltage from 1.91V stock to 1.95V. To increase voltage we must lower the resistance of the variable resistor, before you power on your system always make sure that your VR is set to highest value. Here is how we modded our card:  For the MEM mod we actually didn't use a 20k VR, we made the combination of putting a 10kOhm VR in series with a 10kOhm normal resistor. This will avoid over voltage (max 2V) and more currency on our voltage range. For both GPU and MEM voltage modifications we used the same 'ground' connection. If you watch on our mod-pictures we see that we always have to solder between red and pink points. In real life those red points are points connected to ground. You can use any ground point for doing those modifications, though we always made sure we had a ground point available on each picture for people who want to use those points. If you have a 8800 GTX, you need a different instructions, turn the page ->  |
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Copyright © 2001-2010 Madshrimps / JMkeOC.com, All rights reserved.
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All information and graphics contained in Madshrimps are sole property of the Madshrimps crew and may not be reproduced or copied in any manner without written permission from us.
BTW-BE 0888919678
Graphical Design by Dennis Kestelle, Programming by John Meys, Paul Meys and Frederik Colardyn, Overall Site design by John Meys
All information and graphics contained in Madshrimps are sole property of the Madshrimps crew and may not be reproduced or copied in any manner without written permission from us.
BTW-BE 0888919678
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