BFG 6600 GT OC PCI-Express voltmods?

[felinusz]

I just ordered a 128 Meg PCI-E BFG 6600 GT OC card to replace the WR X700 Pro that I fried yesterday :banana: .

I've been looking around, and cannot find a voltmod guide anywhere for this card's PCB (THIS CARD USES THE STANDARD 6600 GT PCI-E PCB). Ideally I'd like to know the mods before the card gets here in 2 days, so that I can pick up the VRs that I'll need.

I want to get this little blue gem "all hooked up" the very day that she gets here :D.


Any help is greatly appreciated - I can provide better scanned pictures once the card arrives, if a guide does not exist or if these pictures are not sufficiently detailed.

Front: http://www.firingsquad.com/hardware/bfg_geforce_6600_gt/images/01.jpg (click to enlarge)

Rear (I couldnt find a really good rear shot, which is really the only one that matters.... :stick: ): http://www.aselabs.com/img.php?id=1316&asesessid=615d457e5d2f48a5dfdd0b33b6ac9ef6c660214a
http://www.hardocp.com/image.html?image=MTEwNzc0MDMwOHZRcjBSSjBhUGhfMV8xN l9sLmpwZw==

[felinusz]

Anyone?

VR-Zone has a guide for PCI-E 6600 GT cards, but their website is down....


EDIT: And it's back up again :D.
http://www.vr-zone.com/?i=1636&s=3


EDIT2: AND, they've only got the core mod listed, and it's not a mod I am willing to do if I can help it. I prefer not to solder anything to SMD resistors unless absolutely neccessary.

Does anyone know the VCore, VDDR, and VDDQ mods for the PCI-E 6600GT? In specific, I would like to be soldering my VRs directly to the voltage regulation ICs, as I find this far easier and safer then soldering leads to SMD resistors.

[felinusz]

Let’s check it out. The core voltage regulator is based on the ISL6534 chip from Intersil. It is a dual-channel pulse-width controller capable of driving a line regulator. One of the channels supplies power to the GPU. Unlike the regulators on GeForce FX 5950 Ultra or FX 5900 Ultra cards, which have digital inputs for setting the output voltage level and capable of adjusting the output voltage “on the fly”, this chip uses a resistor devisor for setting the output voltage.

Curiously enough, the NVIDIA engineers made this regulator change the output voltage “on the fly”, too. Receiving the control signals from the GPU’s registers, two transistors attach resistors with preset resistances to the devisor, thus adjusting the voltage value. Voltage regulators on NVIDIA GeForce 5900 XT cards employ the same idea, by the way.

In order to lift the voltage of the graphics processor, you only must reduce the resistance of one of the divisor’s resistors....

Alright, so it looks like I can't solder my VR directly to the Vcore regulation IC...

THIS (http://www.xtremesystems.org/forums/showthread.php?t=48932&page=1&pp=25) thread is of interest, but not particularly helpful on account of it being about the AGP model.


Has no one VDDR/VDDQ voltmodified a PCI-E 6600 GT before? :banana: