This is where you will find information about the most energy efficient mining hardware recommended by @phusionphil, @themeek, @darkflame or any of the Phusion's Multipool affiliates.
Nvidia ~ GTX 1080ti 11GB 352-Bit
Nvidia ~ GTX 1070 ti Models
AMD ~ RX 470 Mining Edition 8gb
AMD ~ Radeon RX Vega 56 8GB 2048-Bit HBM2