ATI HD4350 VMod's

[V2-V3]

Has any one seen any Vmods for an ATI HD 4350?

I have an ASUS HD 4350 512MB DDR2
and am currently testing and looking for a working vmod on GPU + RAM

Will be testing new LN2/Dry Ice GPU pot :)
Pictures:
http://i54.photobucket.com/albums/g94/V2-V3/GPU%20LN2%20DI%20Pot/th_DSC07142.jpg (http://s54.photobucket.com/albums/g94/V2-V3/GPU%20LN2%20DI%20Pot/?action=view&current=DSC07142.jpg)
Front view of card with out the fanless Silent aluminum cooling plate
http://i54.photobucket.com/albums/g94/V2-V3/GPU%20LN2%20DI%20Pot/th_DSC07157.jpg (http://s54.photobucket.com/albums/g94/V2-V3/GPU%20LN2%20DI%20Pot/?action=view&current=DSC07157.jpg)
Back of the card with the new Aluminum 4xxx, x2 LN2/DI GPU Cooler.

[largon]

Resistance between pin #3 and #6 (opposite pins) on the circled chip? Dimple marks pin #1.
And what does it read on the chip?

92227

[V2-V3]

Largon,

The IC reads
"uP6101BU8"
"VGB88E"

1- 5
2 6
3 7
4 8

I believe this is how you count the pins?
Between pin 3 and 6 is 2ohm

about 9.5ohm between pin #3 and #5

about 891ohm between pin #3 and #7

I believe pins #3 and #7 are reference feedback

I cant seem to find a data sheet to confirm.

I have taken better pictures with a new camera:
http://i54.photobucket.com/albums/g94/V2-V3/4350%20Vmod/th_100_0649.jpg (http://s54.photobucket.com/albums/g94/V2-V3/4350%20Vmod/?action=view&current=100_0649.jpg)
http://i54.photobucket.com/albums/g94/V2-V3/4350%20Vmod/th_100_0650.jpg (http://s54.photobucket.com/albums/g94/V2-V3/4350%20Vmod/?action=view&current=100_0650.jpg)


Resistance between pin #3 and #6 (opposite pins) on the circled chip? Dimple marks pin #1.
And what does it read on the chip?

92227

[largon]

Pin#3 is ground. The pin on the opposite side is pin#6 (not pin#7), pin#6 is FB.

This is how the pins are numbered:
1┌─┐8
2│─│7
3│─│6
4└─┘5

1 = boot
2 = ugate
3 = gnd
4 = lgate
5 = vcc
6 = fb
7 = comp/en
8 = phase

vGPU mod:
Solder a 20kΩ VR between pin#6 and ground (pin#3, eg).
Tune down to increase vGPU. Measure vGPU from the legs of the alu capacitor located on the backside closest to uP6101.

edit:
Forgot about vMEM (vDD/VDDQ combined)...
There's a similar chip also on the backside of the card near the GDDR chips - is that uP6101 too?
Resistance from pin#3 to pin#6? Should be lower than for the vGPU mod, around 500Ω maybe?

[lycanwrath]

Pin#3 is ground. The pin on the opposite side is pin#6 (not pin#7), pin#6 is FB.

This is how the pins are numbered:
1┌─┐8
2│─│7
3│─│6
4└─┘5

1 = boot
2 = ugate
3 = gnd
4 = lgate
5 = vcc
6 = fb
7 = comp/en
8 = phase

vGPU mod:
Solder a 20kΩ VR between pin#6 and ground (pin#3, eg).
Tune down to increase vGPU. Measure vGPU from the legs of the alu capacitor located on the backside closest to uP6101.

edit:
Forgot about vMEM (vDD/VDDQ combined)...
There's a similar chip also on the backside of the card near the GDDR chips - is that uP6101 too?
Resistance from pin#3 to pin#6? Should be lower than for the vGPU mod, around 500Ω maybe?

Hello Largon, Could you plz help me out with a pencil mod on my HD4850 :-
http://67.90.82.13/forums/showthread.php?t=190990&page=53

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