Quote from: citronick on June 22, 2017, 02:24:20 PM

Quote from: bentcrypto on June 22, 2017, 11:41:43 AM

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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scrapbook: 199CRmTihjCptayc5v3mLTiLEJ6k88eyXb

Standard USA electric coming into residential housing is 240 vac single phase. Which is 2x 120 vac power lines and 1x common. In the panel the 120 lines feed one buss each so the 240 breakers feed off both busses and the 120 breakers feed off one or the other.