Hallo,
System:
6xSAPPHIRE NITRO+ RADEON RX 470 8G
ASRock H81Pro BTC 2.0 Mainboard LGA 1155
Intel Celeron G1610, 2x 2,6GHz
4 GB RAM
Super Flower - Leadex Titanium 1600W Netzteil
Windows 10
Claymore's Dual Ethereum AMD+NVIDIA GPU Miner v9.1
I measure the power consumption with a calibrated electricity Watt meter
691 Watt / 168,5 MHS
-> 4,1 Watt / MHS
get someone better efficiency?