I am limited by capacity(small) and power price (high).
The way I see it is if I run mine at 6mh/watt then 1000watts=6500MH.
If you run yours at 4.5mh/watt then 1000watts=4500MH.
Have I got it wrong??
In my warehouse, I have asked my electrician to give me 20amps per circuit.
During my 1080ti farm deployment planning:
One circuit ==> 4 power outlets
4 power outlets ==> 5amps each maximum load.
5 amps x 220v = 1100watts per outlet
1100watts ==> 1 rig
Apply 20% buffer to keep your PSU safe, no stress and working for a long time 24x7
1100watts x 80% = 880w
1 rig ==> 3 x 1080ti = 880w including power mobo, cpu etc.
Assume mobo, cpu, etc consume 150 watts, 730 watts available for GPUs
730watts divided by 3 = 243watts each (3 x GPU rig)
or
730watts divided by 4 = 182watts each (4 x GPU rig)
For every circuit, you can now power 4 rigs with the specific amount of "firepower" you need...
So a 3 x 1080ti powered all the way up to 243watts will give you decent hash.
The 4 x GPU rig, IMHO is the best hash ratio.
Phil - can you help double confirm my calculations.
BTW, USA power rating usually is by default 120v while UK and ROW mostly 220-240v format.
For my 1070 farm, I think I will go for density because these cards can do very low tdp with very good hash ratio.
Thinking of 9 x GPU rig below 2000w-2100w or slightly over 10 amps...
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