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