I just put together a new rig with 4x RX 580s. I have them in gaming mode with compute workload selected. The VRAM is clocked at 2250 with the fans running at 80% and power usage set to -15%. Ihave started with a Windows box running CudoMiner software to get me going but for some reason it is only using 2 of the GPUs. I am getting almost 29Mh/s per card but it is weird to me that only 2 cards are running. And it is the middle 2 cards to boot.