The Nvidia GeForce GTX 1070TI graphics card is the top pick in terms of hashing efficiency per watt. Until WhatToMine.com actually lists the 1070TI, hopefully this table will offer you some much needed guidance. Optimizing your individual graphics card isn't a walk in the park, so this will help tell you what hashrates to aim for.
The following table was prepared independently using several different 1070TI models: ASUS ROG Strix, EVGA SC, MSI Duke, and ASUS Turbo. Results were averaged for the sake of readability.
TDP 78 +/- 9% | Core +135 +/- 22 MHz | Mem +525 +/- 75 MHz
| Algorithm | Hash Speed | Watts | Efficiency |
|---|---|---|---|
| Ethash | 30.4 Mh/s | 130 | 0.23 Mh/W |
| Groestl | 39.8 Mh/s | 148 | 0.27 Mh/W |
| X11Gost | 12.9 MH/s | 138 | 0.09 Mh/W |
| CryptoNight | 645 h/s | 118 | 5.47 h/W |
| Equihash | 515 sol/s | 132 | 3.90 sol/W |
| Lyra2REv2 | 45100 kh/s | 185 | 244 kh/W |
| NeoScrypt | 1230 kh/s | 142 | 8.66 kh/W |
| LBRY | 320 Mh/s | 136 | 2.35 Mh/W |
| Blake (2b) | 1840 Mh/s | 136 | 13.5 Mh/W |
| Blake (14r) | 2850 Mh/s | 143 | 19.9 Mh/W |
| Pascal | 1100 Mh/s | 140 | 7.86 Mh/W |
| Skunk | 31 Mh/s | 135 | 0.23 Mh/W |