Here are some wattmeter readings from my 5x 1080ti Rig.
All 1080tis are founder edition.
+250 core -502 mem
50% pow limit 700W 3885mh/s
55% pow limit 766W 4086mh/s
60% pow limit 840W 4250mh/s
65% pow limit 910W 4408mh/s
70% pow limit 980W 4520mh/s
75% pow limit 1050W 4640mh/s
80% pow limit 1125W 4740mh/s
85% pow limit 1195W 4833mh/s
Specs:
Biostar TB250 BTC
Pentium G4560
4Gb ram
60gb ssd
Evga 1200P2 power supply
240V line.
so :
60 to 65 = 70 watts more and you get 158 mh extra
65 to 70 = 70 watts more and you get 112 mh extra
70 to 75 = 70 watts more and you get 120 mh extra
75 to 80 = 75 watts more and you get 100 mh extra
80 to 85 = 70 watts more and you get 93 mh extra
and I know that
85 to 90
90 to 95
95 to 100 are all worse then 80 to 85
ie the real cliff of waste is at 85 to 100
If it were colder I would run 80%
but I have no cooling in the garage none nada zip I have not been able to run with summer power cost since 2013 so I never bothered to make the garage have good cooling.
I am running in the 60% area for now and in the fall I will clock higher.
also remember my summer power is 16.7 + say 2.3 for ac costs. so 19 cents
my winter power is 12.7 - say 3 cents for free heat so 9.7 cents.
so OCT 1 my power bill is dropped 45- 50% until June 1 next year.