The most power efficient GPU?

There was always a fight between the two camps - intel vs AMD, AMD vs Nvidia. When mining, nobody cares about this. All miners want is the best hashrate and most power efficient GPU.

See below how the Team Green and Team Red perform on EThash algo:

Best Hashrate per Watt ratio GPUs

Nvidia:

Model - Watts - hashrate = efficiency

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1050Ti - 50W - 15mhs = 0.3 Mh/W

1060 - 60W - 25mhs = 0.41 Mh/W

1070 - 86W- 32mhs = 0.37 Mh/W

1070Ti - 100W - 34mh/s = 0.33 Mh/W

*1080 - 160W - 54mh/s = 0.33 Mh/W

*1080Ti - 170W - 56mh/s = 0.32 Mh/W

  2080 - 145W - 41mh/s = 0.28 Mh/W

*(with the ethlargement pill)

Don't believe? Learn how to undervolt Nvidia

AMD:

Model - Watts - hashrate = efficiency

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RX470 - 105W- 26Mhs = 0.24 Mh/W

Rx480 - 120W - 29Mhs = 0.24 Mh/W

RX570 - 90W - 30mhs = 0.33 Mh/W

Rx580 - 95W - 31mhs = 0.32 Mh/W

Vega56 -170W - 46mhs = 0.27 Mh/W

Vega64 - 200W - 48mhs = 0.24 Mh/W

** All video cards are overclocked, undervolted and optimized for best stable hashrate while keeping the cost and temperatures as low as possible for 24/7 mining!

*** The results are calculated for cards using Samsung memory (Nvidia only!). This is the best case scenario -  Second best is for Micron, Hynix has a memory controller limit, which limits the maximum load to around 90%, preventing the card to go to full speed during mining. During gaming it works normally.

*** All power values should be measured with a watt meter. Software meters are not correct.
All of the above values are approximate. There are too many variables which can influence the numbers. However the biggest difference should be no more than 4Mh/s:

1. Is the GPU tuned for best power efficiency?
2. At what temp the GPU is running? Higher temps cause worse power efficiency due to fan speed increase.
3. At what TDP value you are running them? Minimum is 50%, max is 100.
4. GPU quality - how stable power delivery the card has; -how good is the cooling (more heat pipes, copper pipes, etc); -memory brand used; -core voltage achievable.
5. PSU (Platinum, Gold, Silver, Bronze) MB, CPU, Risers, HDD/SSD used. You can shave off some watts by using SSD and downclocking and undervolting the CPU.
6. Linux or Windows? Windows tends to have a little bit better options for fine tuning.
7. How stable it is for 24/7 mining operation?

How do YOU manage to get the most out of your cards? Please share your hashrate!