I have been building PC's for over 15 years, and I know that in the past, motherboard stand-off's and mount screws were necessary for proper grounding. I have recently been working with a crypto currency mining startup. We have two rigs with identical hardware, except for the GPUs. One of our rigs is running nvidia GTX 1070Tis and works as expected. The other is running ATI RX 580s and is getting extremely low voltage to the GPU's. The powered risers have been replaced, as well as the PSU. No change. I know that now days, not all of the stand-off holes in all motherboards are grounding loops. Our rig boards are sitting on foam on a metal rack, with no stand-offs and no mount screws. The motherboard model is asrock h81 pro btc R2.0. Before we replace the board, I'm wondering if it could be a grounding issue with the board. The manual is no help, and I am not physically there to check grounding with a multi-meter. Does anyone know if this board requires stand-offs and mount screws for proper grounding? I'm running out of ideas. Any help would be much appreciated. Thanks.
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