9600GT voltmod thread

[Lithan]

Lithan,
Set it at max resistance.
vMEM mod wouldn't do any good as these cards have Qimonda crap GDDR3 and vDDQ = vDD. Increasing memory vDD would only make it worse.

thanks much.
Could you elaborate on qimonda crap GDDR3? About how high does it go with a little luck?

[jan]

please report the code of this marked IC's

Ther upper IC:

APW7088


The IC on bottom:

APW7067N

http://www.coldbug.de/Bilder/9600gt/sparkle/back2.jpg

[akin]

ok for now, i just can give you the soldering point of the memory vmod. for this card, vmod point is on the pin #4. for the value of the resistance, just measure the default resistance on this pin first.

[largon]

Lithan,
Stability is unlikely >1GHz with Qimonda RAM.

jan,
For the vGPU mod:
What's the resistance from pin#13 to ground on APW7088?
Are the points marked in green connected to pin#13?

edit:
vGPU mod: 20kΩ VR from either green spot to ground.

[akin]

based on APW7088 Datasheet, this IC's used 3-bit DAC to drive the error aplifier of the output voltages.
so if you just change the FB resistance, the OVP will work, same as my POV 9600GT's

[largon]

akin,
The FB method would allow VGPU upto almost 1.4V before OVP hits.

[jan]

ok for now, i just can give you the soldering point of the memory vmod. for this card, vmod point is on the pin #4. for the value of the resistance, just measure the default resistance on this pin first.

resistance from pin#4 to ground is 0,914 kOhm

jan,
For the vGPU mod:
What's the resistance from pin#13 to ground on APW7088?
Are the points marked in green connected to pin#13?

resistance from pin#13 to ground is 0,965 kOhm

The marked points are connected to this pin

[largon]

20kΩ VR from either of the points I marked in green to ground in the pic ABOVE. Don't go above 1.35v and you should avoid over voltage protection from causing a crash.

For vGPUs higher than 1.35v a more complicated mod is needed. First step would be tracing where the marked pins (#11, #15, #21) lead. It might also be helpful to measure the resistance from each to ground.

[jan]

i'll measure resistance later also where the pins lead

maybe stupid question, but where are vgpu and vmem measuring points?

[akin]

for voltages measuring point is here :

[jan]

big thanks for the help so far

i'll try the mod on the weekend

@akin

what resistance vr is needed for the vm mod?

[akin]

big thanks for the help so far

i'll try the mod on the weekend

@akin

what resistance vr is needed for the vm mod?

just measure the default resistance first, if the default is about 8K, you must use 100K VR.

[busta_dude]

I just wonder about this jumper with the label J2. What is it purpose anyway? It on Galaxy 9600GT OC....



Clearer version of the jumper thingy....

[wittekakker]

Where did you get those pictures from? What do those site tell you?

[massman]

Noticed that too, forgot to ask Galaxy though .

Galaxy 9600GT voltmods can be found here: http://www.madshrimps.be/?action=get...45&articID=802

[jmke]

most likely to select NTSC/PAL for video-out

[Dural]

Fr3ak,
Have you tried to disable OVP by grouding pin #35 on ADP3208A?

Pin 35 is where?

[largon]

Dural,
12pins / side -> #35 would be the one before the last on the "right side" of the chip.



How high voltage does your card do before it crashes?

[Dural]

Vgpu mod 9600GT reference design not possible, crash @ 1,2xx + Volt

Vmem mod for the palit/gainward?

[TheGoat Eater]

largon - PALiT vanilla 9600gt vcore mod on the way!

[Dural]

Vmod for Gainward 9600GT:





My Gainward @ Aircooling (Coolink GFXChilla)

[Fr3ak]

Once I figured out why my card is not working at all any ore, I will try to ground pin35 and see what happens. Seems to be difficult though

That's the downside of chips getting smaller, hehe

Busta_Dude: YOur mysterious jumper is a SPDIF-in

[largon]

Fr3ak,
Can you measure the voltage on that pin?

[Fr3ak]

I am afraid, I cannot. There is no way I can measure that specific pin with the lousy equipment I have. I will try to solder a wire to it tomorrow, so I can measure it. I just moved and dont even have a lamp, so I have to wait until tomorrow in order to see where I solder.

[largon]

Hmm...
Damn. It's starting to look like pin#35 is not the OVP-pin after all. Fr3ak, no need to measure it nor even try to solder on it.