My results

My rig on 4 GPU runs on coolMiner v. 1.1 almost 2 days stabilyty with no crashes
GPU # 1: EVGA GTX 1080 Ti - 3575 kH/s
GPU # 2: ASUS GTX 1080 Ti - 3581 kH/s
GPU # 3: ASUS GTX 1080 Ti - 3595 kH/s
GPU # 4: ASUS GTX 1080 Ti - 3601 kH/s
All GPUs run on 1999 MHz, -i=19.75

Good JOB! and thanks to Ryzen2700x