When to underclock my s-1. June 1st , July 1st??

[philipma1957]

A few people have asked me to show them how to know when to underclock/undervolt

 an s-1 to max fiat profit.

the current thread on how to do it.

https://bitcointalk.org/index.php?topic=526060.0

  This does not factor your heating and cooling only fiat profit
 
I used this calculator

https://bitcoinwisdom.com/bitcoin/calculator

Here is a side by side screen shot of when to determine the time to under clock










If you look at the side by side .

  you see I did 7 s-1's   

  one at overclock    1400gh and 2800 watts

the other at under-v /under-c        1050gh and 1400watts.

I used my summer power  rates of 18 cents a k-watt I used 15% diff jumps and 432 usd a btc.

If you look down the side by side charts  you can see the time to do the switch is right after June 20th


june 20th  with under-v/under-c the after power fiat profit is   161.20
july 3rd     with under-v/under-c the after power fiat profit is   129.90


june 20th with 393 over clock  the after power fiat profit is     162.50
july 3rd    with 393 over clock  the after power fiat profit is     120.70



Of course   power cost will vary, diff varies, btc price varies.   


  This is still the method to determine when to lower clock and voltage.  You will need to plug in your numbers at each diff jump to be perfect but the side by method of calculator will show you the correct answer.

[rograz]

To know when to under-volt yo will have to calculate when (the reduced power draw/reduction in hash rate) in terms of efficiency becomes unprofitable. When the initial performance/watt of the miner becomes unprofitable doesn't matter, example.


Under-volted ant

140GH/170ish watts

Stock ant 200GH/380W

So the number we are looking for is when (380W-170W) / (200GH -140GH) = When 3,5W per GH becomes unprofitable for you is when you should under-volt.

[klondike_bar]

depends on at least 3 factors:

1) electricity cost: if you pay >$0.20/kWh you will be underclocking a few weeks sooner than those paying <$0.15/kWh
2) temerature and electrical capacity: if your place is getting too hot it may make sense to undervolt a little bit to reduce the power used and thus temperatures
3) your short-term and long-term views of USD/BTC.  If you expect us to sit around $400-600/BTC for the next 6+ months then you will underclock sooner (at a loss of hashrate) than those who expect it to go to $1000 or higher and thus justify the higher power costs to produce the maximum BTC possible

[philipma1957]

depends on at least 3 factors:

1) electricity cost: if you pay >$0.20/kWh you will be underclocking a few weeks sooner than those paying <$0.15/kWh
2) temerature and electrical capacity: if your place is getting too hot it may make sense to undervolt a little bit to reduce the power used and thus temperatures
3) your short-term and long-term views of USD/BTC.  If you expect us to sit around $400-600/BTC for the next 6+ months then you will underclock sooner (at a loss of hashrate) than those who expect it to go to $1000 or higher and thus justify the higher power costs to produce the maximum BTC possible

 

1) is true

2) is true-------------I can do 2000 summer watts and manage the cooling. I can do 4000 winter watts.

3) really complex   difficult to agree or disagree.  a lot of factors to take into account .   

My numbers used will vary from miner to miner but the side by side comparison technique of bitcoin wisdoms calculator will help you ballpark.