Gigabyte 5870 SOC

[miahallen]

Please use the following mods at your own risk. Nobody here is responsible for damages done!
Credit to BenchZowner for the mods here....thanks Bill

Simple FB mod: ( corrected!)



Measure the resistance between the circled resistor and a ground and connect a VR ( trimmer ) 20 times the resistance measured.

VID mod:

Check the VRD11 codes for the On Semiconductor ADP4100 from the PDF - http://ceemic.pri.ee/hardware/datasheets/ADP4100.pdf [ nice library Ceemic ]
And move the resistors to the proper locations ( logic high (1) or logic low (0) ).
Logic high = front side of the card
Logic low = rear side of the card

photos:

VID Low ( 0 ) - rear side


VID High ( 1 ) - front side


You have 7 resistors, you have to place 1 resistor for each VID bit ( VID0, VID1, VID2, VID3, VID4, VID5, VID6, VID7 ) to High ( 1 ) or Low ( 0 ) depending on the voltage you want to apply ( according to the ADP4100 datasheet ).
If you leave a spot open ( not connected via a resistor ) on both Low & High it will be considered as Low ( 0 ) by the PWM controller.

OCP Mod:



You can mod the card ( add a LED ) to monitor OCP, or use an oscilloscope
If OCP/OVP kick in your GPU's voltage should be 0.3x after it crashes or hangs.

Application - 5870 SOC Tuner beta:

http://www.benchzone.com/Downloads/T...70socTuner.rar

WORKS FINE FOR E.S. cards
FOR RETAIL CARDS GPU Core Voltage ( Vgpu ) DOES NOT work
The other voltages ( Vmem, Vpcie, Vddci ) WORK FINE WITH BOTH retail and E.S. cards.