Galaxy 7600GS 128MB DDR3 Voltmod - vGPU & vMEM (non-reference)

[Mord]

So, here it is:

1. Control points for the vGPU & vMEM:

VGPU:
Measure between GND (point 0 for example) and point 1, 2, or 3. If it's hard to measure here - do it on the other side on the corresponding capacitor or the parallel mosfet of p.1 .

VMEM:
Point 4 - on the leg of the mosfet.






2. The MOD:
You need two trimmers of 100kOhm.
Red is for VGPU, green for the VMEM. Black is GND - your choise. I prefer the resistor, as shown.

VGPU is done on FIRST leg of the regulator (FB1), VMEM on the resistor 336, as shown. FYI its connected to leg 4 of the regulator (FB2) and can be soldered there.





If the trimmers are sticked to the capacitors as shonw and you can read their description, then rotating them counter-clockwise should increase voltage. Watch it with care. It shifts slowly at the beginning, and very smooth afterwards.

The resistances between these legs and GND before the MOD are (with vGPU jumper at overvolt position):
FB1: 652Ohm
FB2: 228Ohm

The effect is impressive! The core made a huge increase from stock volts OC of 670MHz to rock stable 720MHz. And the memory - from 1610MHz to 1800MHz for benching, 1780MHz for 24/7. Consider that the GPU overwolts under load with about 0.020-0.035V.

Gonna post pics with the water cooling soon .
The regulator is ISL6534, if someone is interested.

Thanks go to my commrad Yovchev for all the help.

I've been using the card 24/7 for 3 weeks now and haven't had any issues.
720/1780MHz @ 1.605V/1.89V. WC'ed GPU (never went more than 52 degrees), and HUGE ramsinks on the MEM (never more than 40*) and all the mosfets (same temp here) with a 120mm@1000rpm blowing directly at the card. 3D05 - 7150+ Marks.
EDIT: FutureMark now supports 7600GS cards. Here's an url - 7153

Good luck and report!


Disclamer: Everithing you do is on your own! You may and you will lose your warranty after the MOD. I cannot be held responsable of anything!

Cheers,
Abyss

[g0dM@n]

subscribed...

[bazx]

thanks for the mod dude

[G H Z]

Thanks for the mods

Time to blow one of these up.

[Mord]

Thanks, guys
Not bad for a first post, is it?

But there's the bad news - now I don't have a toy to play with... Not until Conroe comes (I'll be back in the Intel club )

Unless... the timingsets of the card's memory and perhaps more vGPU? I'm really thinking it can handle 1.7V 24/7. With my WC setup it's way off the dangerous temps - increase from stock 500MHz/1.38V vCore to 720MHz/1.605V was a mere 3 degrees under hours of 3D05 (45->49).

And the card is 1.4ns Samsung, which uses the nr.7 timingset. And looking at the datasheet (page 52 of 53) I can read that the difference in timings between 1.4 and 1.2ns is quite small. So maybe I'll try them.

What do you think of those "add-ons"?

[RockinHack]

Oh yeas,7600 gs@7600 gt its very nice!!!

What is the price of galaxy 7600 gs?

And all models have gddr 3 mem?Are there diffretent revisions ?

[smart1]

Is this the same for 256mb ver.?

[smart1]

What is the price of galaxy 7600 gs? And all models have gddr 3 mem?Are there diffretent revisions ?

here is a list of galaxy 7xxx serie cards with secs&pics. I would rather go for 128mb ver. with 1.4ns mem. another ineresting 7600gs availaible here is Jetway 7600gs 256mb ddr3 1.1ns samsung at stock clock 500/1400 (same as GT) easily clockeble up to 650/1650 without v-mod on stock cooling, I do think it shoud reach 700/1800 with v-mod and Zalman VF700/900 cooling.

[luf1c3r]

Thank you for the mod

[Chaos-PL]

anyone know how to mod galaxy 7600gs with new pcb?
i had galaxy 7600gs 2ns and now i got new one .. with 1.2ns (625/1750 so far) ... but there are differences in pcb ..

here are the pics of both cards
http://chaos.dracopc.com/pub/galaaxy/1.2ns/gs%20002.jpg
http://chaos.dracopc.com/pub/galaaxy/1.2ns/gs%20004.jpg
http://chaos.dracopc.com/pub/galaaxy/1.2ns/gs%20005.jpg

here you have more pics... with closeups on some "things" on pcb ;]

if anyone can help me i'll be grateful

my results so far:
01 - 31023 / 03 - 15707 / 05 - 7320 / 06 - 3620

edit:
vgpu and vmem measure points:


idle 1.36/1.89
load 1.4/1.9

[Mord]

Give me a pic of the regulator at the front of the card. The one in the upper right corner. If it's the same - same mod. And differences are simple cosmetics, I presume. Check the regulator.

Cheers,
Abyss

[Mord]

We'll never be friends again .

[Chaos-PL]

We'll never be friends again .

huh? what do you mean
(if you mean that i didn't reply fast .. i'm sorry .. i got lots of polish forum to read

I already know what to do ;]
voltage regulator is different on new pcb
but both (gpu & mem) are the same ... its ISL6549

pics
http://chaos.dracopc.com/pub/galaaxy/1.2ns/gs%20008.jpg
http://chaos.dracopc.com/pub/galaaxy/1.2ns/gs%20012.jpg

so method is same as here
correct me if I'm wrong

btw if someone is interested
2x 7600gs Galaxy Zalman 1.2ns 256mb 640/635:
03 - 25.8k - http://service.futuremark.com/compare?2k3=4867583
05 - 11936 - http://service.futuremark.com/compare?3dm05=2108201 (couldn't do 12k )
06 - 5.5k - http://service.futuremark.com/compare?3dm06=382369

[Mord]

Cause you beat me by a small margin . And btw - I don't reply as fast too.

And you're right about the mod.

Cheers,
Abyss

[Chaos-PL]

Cause you beat me by a small margin . And btw - I don't reply as fast too.

And you're right about the mod.

naaahh ;] look at your core clock .. your scores should've been much higher.
you didnt work on your score enough :P

btw ... my 7600gs sli 05 score is WR ;]

[fakhrain]

What pcb do these 7600GS running? I'm just wondering if they're using the same pcb as my 7300GT DDR3 (w/Zalman fan). Under nVidia properties, my pcb board revision is p456h1.

[Mord]

What pcb do these 7600GS running? I'm just wondering if they're using the same pcb as my 7300GT DDR3 (w/Zalman fan). Under nVidia properties, my pcb board revision is p456h1.

Gotta check that. I'm not sure. I think a guy over here in BG has made a mod on the normal 7300gt ddr3.

Chaos, I know i must have bigger scores, but...
Can you tell me what are your temp under load w/ vmod and o/c... I think mine are a little high - 51-52* on the core.

[Chaos-PL]

Chaos, I know i must have bigger scores, but...
Can you tell me what are your temp under load w/ vmod and o/c... I think mine are a little high - 51-52* on the core.

i dont think that its your temps ...

in poland we have high temps right now (air is around 28-31 during the day)
My card is not yet moded .. just wc on the core .. memory is naked
idle i have 43-46* (depends on water temp) .. 52-54* in stress

maybe your system is messed up .. try instaling new one ... i always got a clean system for benching on the second partition ;]
7.2k in 05 can be made with put a problem with clocks around 640/650 with drivers in quality mode... so you realy have to work on your score ... dont show your self without 8k :>

[fakhrain]

any idea of what those jumpers for?

[Chaos-PL]

any idea of what those jumpers for?

yellow = bigger Vgpu (0.02-0.07 increse)
blue = dual bios (select which bios is in use)
red = buzzer on/off (temperature alarm)

[Chaos-PL]

GPU 1.69v
MEM 2.05v

740/925(1850)
05 - 8188
http://service.futuremark.com/compare?3dm05=2179945

[Ming06]

GPU 1.69v
MEM 2.05v

740/925(1850)
05 - 8188
http://service.futuremark.com/compare?3dm05=2179945

Nice!!!

Some Pics Post ,How to mod vGPU vMEM on Galaxy 7600GS New PCB?
Thanks

[sabinus]

GPU 1.69v
MEM 2.05v

740/925(1850)
05 - 8188
http://service.futuremark.com/compare?3dm05=2179945

Do you know which rezistor is to pencil for vMEM mod? (The vGPU mod worked fine with pencil and I think vMem would work fine too).

I have the same PCB as you have.. only difference is that my board is 7300GT.
Seem to share PCB's.

[Chaos-PL]

i dont know any pencil mods..

you have to solder 4th leg of the controler to ground thru the 50k ohm multiturn resistor (sorry if my english is bad)

some pics

vmem (with measurement points)


vgpu



as far as i know ... 7300GT and 7600GS with new pcb are moded the same way

p.s: when making vgpu mod you can solder to a jumper that changes voltage of the card (the yellow one) ... no soldering on the card needed ..
middle pin is connected to 4th leg od the controler

[sabinus]

Thx. but the new revision dooes not have the yellow jumper (JP3 for 7300GT) anymore
It may need de-soldering of ther "former jumper" solder points and then solder the resistor there

http://www.ixbt.com/video2/images/g7...scan-front.jpg