Club3D 9600XT 256mb vmod?

[thE-maEsTrO]

I read a lot of pages of vmod of 9600xt cards (BBA,Shappire, and other ...) but the pcb of my 9600xt is particular :D

http://img491.imageshack.us/img491/5981/p10104851an.jpg

http://img250.imageshack.us/img250/7456/p10104864lo.jpg

Here the photos

Pls superultragurus of mods take a look!
(sory for bad english... but public school in italy is very bad :) )

THX

[thE-maEsTrO]

cmon men!!! Help me pls!!^^

[SikaRippa]

cmon men!!! Help me pls!!^^

Hi,

I'am not ATI-specialist, but can give some help.. But first of all:are you sure there is no mod-guide for your card ??? Have you tried to google ?

If you are sure there is no guide.. do you have a multimeter to measure some voltages/resistances ?

[thE-maEsTrO]

ThX for the repli!!!

I searched a lot in internet everywhere but i don't see this pcb in other 9600Xt's mod guide!
Yes i have a multimeter but i don't know the points where use it! (Damn school english ^^)

ThX Sika after 3 months that i asked this in a lot of forums this is the first answer^^

[thE-maEsTrO]

****UPDATE****

Maybe i found the points for the vgpu e vmem control(After saw a lot of images online :D )
http://img460.imageshack.us/img460/346/vmemevgpu7rk.jpg

Now what can i do??:cool:

[persivore]

Can you tell me what is written on the chip I've circled. I think that should be the Vgpu regulator.

It looks like the card is using shunt regulators for the Vdd/Vddq supplies, so I don't know if it will be easy to mod those voltages.

[SikaRippa]

Voltages you measured will help a lot :)

I think persivore's comments are most propably 100 % correct (as usual..), and the GPU is powered with a swithing regulator. I was also looking that small chip, because it so optimally placed (between MOSFET's etc.).

I' am 99 % sure the chip is on-semi's '1575' regulator:

http://www.onsemi.com/pub/Collateral/NCP1575-D.PDF

(I was looking that code for a LONG time for another mod some time ago..)

You can check whether you have correct chip by mesuring voltages of pins #1, #8 .. should be VDD = 12 V (5V) and GND, respectively.

Modding the output voltage is relatively simple, see page 11 of the datasheet to get idea. An added resitor between VFB (pin #7) and GND (pin#8) increases Vout. I suggest to test (after testing those voltages!!) with a high resistance Vres ~ 50 kiloohms or higher and measure VGPU frequently while adjusting Vres..

--

Let's take care about Vmem later ...

[thE-maEsTrO]

Tank u guys!

WOW u are a genius !!!^^

Yes the chip is 1575 Pwew (or pwem i don't look good on a another "big" photo!^^)

Sorry for bad english!

[thE-maEsTrO]

Now i measure with multimeter

[thE-maEsTrO]

****UPDATE****

Yes on pin 1 there are 12V
In pin 8 my multimeter dont't see anything (probably i committed an error during the measurement^^)

What do u think??

[SikaRippa]

****UPDATE****

Yes on pin 1 there are 12V
In pin 8 my multimeter dont't see anything (probably i committed an error during the measurement^^)

What do u think??

I think you have THE SAME chip ;) (BTW: In pin #7 there should be ~1 V)

So, if you are willing to test: get high value variable resistor and soldering iron.. be careful, and good lucky :up:

Tip ! solder a fixed resistor (e.g. 1 kohm) in series to prevent short circuit while adjusting.

--

About Vmem mod. I was looking those fotos for a while.. could you give code top of a chip just below your 'white box' with 2.6 V ?

[thE-maEsTrO]

ThX!
Sorry but i am a lot of problem with english:(

This is the test-mod?:

http://img513.imageshack.us/img513/2854/vgpumod2xu.jpg

K? :D

P.S. After this mods i put my pc on the freezer and go to the wr on 3d mark :D

P.P.S The chip below my "white box":D is this "AQ9105FD
N01651
0419A2"

P.P.P.S On pin 7 There are 1,4 v.

[SikaRippa]

ThX!
Sorry but i am a lot of problem with english:(

This is the test-mod?:


K? :D

P.S. After this mods i put my pc on the freezer and go to the wr on 3d mark :D

P.P.S The chip below my "white box":D is this "AQ9105FD
N01651
0419A2"

P.P.P.S On pin 7 There are 1,4 v.

Your figure with Vres etc. looks just perfect :up:

However, I am wondering about 1.4 V ... I suggest to measure following resistances before making mod, POWER OFF WHILE MEASURING !!!!

R(pin7, VGPU) = R1 (see page 11)
R(pin7, GND) = R2 (see page 11)

.. that would help to 'see' whether they have used the same feedback strategy and to obtain precise value for Vres.

--

I could not find (yet) datasheet for that other chip, but I did NOT give up..

[thE-maEsTrO]

Thank u for the help i don't ever meet a person so available.

Now i measure that! Stay tuned!

AiAi... Now i have a big problem... i don't understand how i can measure this resistance... where i can put my multimeter????

[SikaRippa]

Thank u for the help i don't ever meet a person so available.

Now i measure that! Stay tuned!

AiAi... Now i have a big problem... i don't understand how i can measure this resistance... where i can put my multimeter????

At first shut down your PC, important when measuring RESISTANCES !!!

Measuring will be carried out just like voltages, but switch the 'knob' of multimeter in correct position ;) i.e. one lead to e.g. pin #7 and another to e.g. GND ((The resistance value you will get is a some kind of 'sum' of all resistances between those nodes))

[thE-maEsTrO]

kk now i understand here there is my father!!!^^^

[thE-maEsTrO]

Now.. this is the result...

i put on pin 1 and 7 for this results: 750 x Hom 100

Then i put on pin 8 and 7 for this : 230 x hom 100

I don't understand this result very well it can be corret????

[SikaRippa]

Now.. this is the result...

i put on pin 1 and 7 for this results: 750 x Hom 100

Then i put on pin 8 and 7 for this : 230 x hom 100

I don't understand this result very well it can be corret????

Let's see.. I meant a resistance R(pin7, VGPU) = R1 i.e. between pin7 and the VGPU measurement point.

But the absolute value is not so important, because the correct settings can be only found by trial and error (because of the presence of other parallel components deteriorate measurement). Thus the more important is resistance magnitude LEVEL, which is here some hundred ohms ?? (230 ohm ??, pins 8-7).

Adding a Vres+ 1kohm does not change resistance too much (compared to 230 ohms, correct ?), so I think the mod can be tested quite safely:

- Measure VGPU
- Adjust maximum value at first !!
- Solder carefully, check out any shorts !!
- Power on..
- Measure VGPU, any change ?
- Adjust a little bit etc.
- 'go to the wr on 3d mark' ;)

I suggest to google out what is maximum (used) VGPU for your card.

[thE-maEsTrO]

I think is 230 x100 hom = 2,3 Khom??
But in my multimeter there are two scales for hom 1 called only "Hom" and 2 called "Low Hom" (in the first there is 230 x 100 hom and in the second 1,x hom) wath' s the correct scale??

Now ... finally i can start with the mod like my img on the top??

P.S. For the record.. bhè this card with stock cooloing and volt reach 711-360 ....

[SikaRippa]

I think is 230 x100 hom = 2,3 Khom??
But in my multimeter there are two scales for hom 1 called only "Hom" and 2 called "Low Hom" (in the first there is 230 x 100 hom and in the second 1,x hom) wath' s the correct scale??

Now ... finally i can start with the mod like my img on the top??

P.S. For the record.. bhè this card with stock cooloing and volt reach 711-360 ....

Sorry, I did not get the idea :rolleyes:

The value of 2.3 kohm sounds more 'sensible' in that purpose.
Yes, I think you can test the mod, good luck :up:

[thE-maEsTrO]

Very Very THX my friend ! If i reach Wr can i mention u in the title of the orb ??? ^^

P.S. for the ram what can i do??

[SikaRippa]

Very Very THX my friend ! If i reach Wr can i mention u in the title of the orb ??? ^^

P.S. for the ram what can i do??

No problem to use my 'name' .. Please note that some cases (cards) Vmodding does not give too much boost, but hopefully enough to get WR :p:

--

I'll try to look Vmem tomorrow. I think some extra voltage measurement will be required, and it is still not guaranteed Vmodding can be done (easily).

[thE-maEsTrO]

kk Thank u very much!