zeus thunder x3 voltmod

[SpatariuM]

Hy all,
Can anybody who owns a Zeus miner Thunder X6 make some closeup pics of the power chips area, please?
I am interested in the values of the resistors situated between the 2 big chokes and a pic of a power chip area resistors. Please make the picture so the resistors writing can be visible...
-edit- 1:pics no longer necessary; 2:subject name changed

Very usefull would be ,if anybody knows what buck controller chips are used on these boards, to post the chip serial number here.


I am asking for this info because I have bought a defect Thunder X3 from a fellow forum user, and after studying the boards and the hash chips datasheet, I noticed that Zeus has overvolted and overclocked these X3 chips to their (allmost)max values from factory... I am thinking that the ThunderX6 is only a slightly overvolted unit, and would like to undervolt my X3 to those values or below if possible.
 This would also be usefull info to those how want to overclock / mod/ service defect units... etc.
 After I am finished repairing and modding this X3, I could maybe post a servicing tutorial/guideline for these units. (I have managed to fix 3out of 4  hashing boards of this unit and now working on the last one. )

Thank you!

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[SpatariuM]

Regarding voltmodding these units, R1 and R2 are the ones that give feedback to the power controller chips.
As you can see by looking at them, the boards are splitted in 2 halfs, each half having a separate power module (1 module for 16 hash chips) so when modifing R1_1, same modification is needed for R1_2 as they have the same values. The same goes for R2_1 and R2_2.

Zeus chips can operate from 0.8 volts for Vcore upwards ( I did not try to overvolt, so max value unknown).
The interesting thing for me is that these chip can be undervolted/underclocked to require only 3 amp/blade (12-13amp/1complete unit + fans) while hashing at about 2.8-3Mh/s per blade or 11-12Mh/s per unit.  This would mean a power requirement of about 13watts for  1Mh/s at minimum as oposed to over 30 watts/Mh from factory.
  Also, the generated heat would be  almost neglijable at these settings. Probably only using one of the units fans would be enough.

If a modding  and/or service tutorial would be usefull for you, please let me know. 

[Ortek]

Regarding voltmodding these units, R1 and R2 are the ones that give feedback to the power controller chips.
As you can see by looking at them, the boards are splitted in 2 halfs, each half having a separate power module (1 module for 16 hash chips) so when modifing R1_1, same modification is needed for R1_2 as they have the same values. The same goes for R2_1 and R2_2.

Zeus chips can operate from 0.8 volts for Vcore upwards ( I did not try to overvolt, so max value unknown).
The interesting thing for me is that these chip can be undervolted/underclocked to require only 3 amp/blade (12-13amp/1complete unit + fans) while hashing at about 2.8-3Mh/s per blade or 11-12Mh/s per unit.  This would mean a power requirement of about 13watts for  1Mh/s at minimum as oposed to over 30 watts/Mh from factory.
  Also, the generated heat would be  almost neglijable at these settings. Probably only using one of the units fans would be enough.

If a modding  and/or service tutorial would be usefull for you, please let me know. 

Thanks for sharing that. I have a thunder x6 i would like to oc and take to the max.....i just need some help with it. So if you have a tutorial i'd be more then happy