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Vega Finally Unleashed! Fine-tuned performance and power consumption in a single chassis.

Undervolting Through Hex Editor- SimpleMining

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  • XcoderXcoder Member Posts: 35 ✭
    @Wolf0 are you willing to share some more info? That would be great. :smiley:
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  • dext0rbdext0rb Member Posts: 2 ✭
    edited March 2018
    @Xcoder
    From the couple of cards I've looked at, I2C communication is disabled for some reason at the BIOS level.

    By writing to /dev/mem, you can control pin states and bang out I2C without any driver.

    amdgpu code has the registers.

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  • XcoderXcoder Member Posts: 35 ✭
    dext0rb said:

    @Xcoder
    From the couple of cards I've looked at, I2C communication is disabled for some reason at the BIOS level.

    Yes, I'm aware about this.
    dext0rb said:

    By writing to /dev/mem, you can control pin states and bang out I2C without any driver.

    amdgpu code has the registers.

    Yes, this is all well understood. But I tried desperately to find the relevant register addresses from the amdgpu code. Can you give me a hint? I just need the registers to control the needed pins. Anything more is already more or less known to me, e.g. how i2c works and how my VR chip works etc.
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  • dext0rbdext0rb Member Posts: 2 ✭
    get an oscilloscope and probe the bus. fuck with registers until you see something move.


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  • cnilsecurecnilsecure Member Posts: 4 ✭
    @Wolf0 , Can you please give me a good config for sg-miner? with your other tool claymore i am getting 32 mhs per card while with sg-miner i only get 30.5 i know its alot of fine tuning but i would like to understand the basic variable to play with
    thanks for your help:)
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