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.
ZEC
Zcash
Nvidia ~ GTX 1080ti 11GB 352-Bit
750 Sol/s @ 200 Watts * 3.7 hash to watt ratio
Nvidia ~ GTX 1070 ti Models
500 Sol/s @ 105 Watts * **4.7 hash to watt ratio** - most efficient
AMD ~ RX 470 Mining Edition 8gb
285 Sol/s @ 135 Watts * 2.1 hash to watt ratio
XMR
Monero
AMD ~ Radeon RX Vega 56 8GB 2048-Bit HBM2
**1900 sol/s @ 150 Watts**