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Title: Mining with Vega 64 on 17.10.2 - cannot undervolt card Post by: Allen5055 on October 26, 2017, 12:37:57 AM Hi, I have two Vega 64 cards with a R9 290. I was using the blockchain drivers previously and was obtaining 44Mhash/card at 130w by applying a registry tweak and OverdriveNT to lower the vcore of each card to 0.8125v. I just updated the driver to 17.10.2, and while I can easily obtain 44Mhash/card, I cannot get the voltage back down to that level.
I have fiddled around in Wattman. I have lowered the core clock from 1000mhz all the way down to 870 without getting the lower voltages. I have tried autovoltage and manual voltage combinations. For the manual voltage combinations I have tried changing the vcore voltage and the HBM voltage in many combinations, such as vcore/HBM 850/800, 800/850, 950/900, 900/950, etc. I have tried lowering the power limit. I have tried combinations of these changes and the best I can get is with lowering the power limit and vcore, I can get to 0.92vcore. The registry tweak I used before makes my computer not boot into windows. Anyone have any idea how to undervolt Vega64 to 0.8125v using the 17.10.2 drivers? Title: Re: Mining with Vega 64 on 17.10.2 - cannot undervolt card Post by: Marvell2 on October 26, 2017, 05:27:36 AM Hi, I have two Vega 64 cards with a R9 290. I was using the blockchain drivers previously and was obtaining 44Mhash/card at 130w by applying a registry tweak and OverdriveNT to lower the vcore of each card to 0.8125v. I just updated the driver to 17.10.2, and while I can easily obtain 44Mhash/card, I cannot get the voltage back down to that level. I have fiddled around in Wattman. I have lowered the core clock from 1000mhz all the way down to 870 without getting the lower voltages. I have tried autovoltage and manual voltage combinations. For the manual voltage combinations I have tried changing the vcore voltage and the HBM voltage in many combinations, such as vcore/HBM 850/800, 800/850, 950/900, 900/950, etc. I have tried lowering the power limit. I have tried combinations of these changes and the best I can get is with lowering the power limit and vcore, I can get to 0.92vcore. The registry tweak I used before makes my computer not boot into windows. Anyone have any idea how to undervolt Vega64 to 0.8125v using the 17.10.2 drivers? what too are u using to check if the voltages are correct ? I have three vega 56 with 64 bios seems they can do 1105 mem and 38 eth and 150 lbr or 40 eth solo the core voltage says .91-.96 in GPUZ , you were getting lower voltages ? I have the same drivers as you. Also on two cards only half the red lights are lit up but on the other one all the lights are lit up ? wtf ? |