Your power consumption is not accurate. Its software that tells you with a large inaccurate margin of error what you use from the power supply but not what you draw from the wall. Usually you have to add about 15-20% more. So your score is not good.
I mine rock solid 24/7 with Nicehash for over a week now with 2015-2025kh/s per card. My power draw from the wall is 1800 for the total mining rig with an OC core i7 7700k and a buch of staff plug in into it, its also my daily driver. Yeah I know 8 GPU daily driver WTF, but thats what I have now. So I use approximately 200W for the CPU and the rest of the stuff and 1600W for the GPUs. So about 200W power draw from the wall per gpu. Your would be much higher than mine about 225-230 I think. Bare in mind I dont use reg.edit just the wattman settings. Power draw -20% GPU stage 5 Min/Max 1530Mhz and Memoru Stage 3 Min/Max 1100 1500RPM Fan. No registry no undervolting. Just wattman

https://ibb.co/nM4Fq6