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View Full Version : Palit 8800GS (384MB) Vgpu & Vmem Mod


mAlkAv!An
07-09-2009, 08:54 AM
Palit 8800GS (384MB) Voltmod



Overview

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2829

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2827




Vgpu Mod

original resistance: 476Ohm
stock voltage: 1.122V

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2830



Vgpu reading

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2832





Vmem Mod

original resistance: 612Ohm
stock voltage: 1.98V
controlling IC: RT9259 (http://pdf1.alldatasheet.com/datasheet-pdf/view/207982/RICHTEK/RT9259.html)

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2819




VTT Mod

original resistance: 404Ohm
stock voltage: 1.167V
controlling IC: RT9259 (http://pdf1.alldatasheet.com/datasheet-pdf/view/207982/RICHTEK/RT9259.html)

http://www.freeocen.de/wbb2/attachment.php?attachmentid=2831
ceemic
07-10-2009, 03:57 AM
Nice, but are You sure Vgpu is controller by RT9259?
I'd say one is for Vmem and other "Vtt"...

Vgpu PWM controller might be other side PCB (underneath the "Vgpu Reading Area" You marked on first pic).
http://ceemic.pri.ee/hardware/palit_8800gs.JPG

If You have done the mods and they work, then just ignore my post :)
mAlkAv!An
07-10-2009, 04:42 AM
I already had that same thought. For now I did the mod but didn't testet with that much voltage, just +0.1V. So I'll report back after trying that.
You are probably right that it's for VTT or something similar.

Thanks for the input :)
largon
07-10-2009, 05:53 AM
I think ceemic is right.
mAlkAv!An
07-10-2009, 06:43 AM
updated first post
ceemic
07-10-2009, 07:02 AM
Nice :)
mAlkAv!An
07-10-2009, 07:16 AM
Thanks again, i was to hasty yesterday ;)

For now my card is running 3DM01 nature at 800/2000/1000, but it's getting simply to hot with that stock cooler.
I need to get that nasty hs paste off the GPU to put my AC S2 on it :)
celemine1Gig
07-23-2009, 09:36 AM
A little constructive criticism: It is a bit misleading that you marked the feedback pins and GND, both using the same color in all your pics and then wrote something about alternate soldering points. For what, GND, FB? This way some people might end up connecting a resistor between FB and FB, i.e. creating a non-working mod (although it should do no harm).
Just edit your pics. Mark GND seperately in a different color or leave it out completely.

Besides that, it looks like a good tutorial for modding that particular card. ;)