how long is the ROI on them , atm?
There are calculators for that... Simple google search would have given you a good guess.
Calculate around 200+ days given the low LTC price, the increasing diff and your electricity costs
Mine are doing a whopping 2.50 profit a day per machine (and mine are overclocked)
Using the free pool that pays at 101%
www.litecoinpool.org/calc calculator I get the following
At next months summer rate (April 2018) starting soon....of 12c kWh and $142 LTC price and 400w and 250mh an L3 gets below:
$1.79 per day for an L3.
24 hours 0.02073776 LTC 2.94 USD 1.15 USD 1.79 USD
7 days 0.14516432 LTC 20.61 USD 8.06 USD 12.55 USD
30 days 0.62213280 LTC 88.34 USD 34.56 USD 53.78 USD
$3.59 per day for an L3+.
At 12c kWh and 800w and 500mh and $142 LTC price an L3+ gets below:
24 hours 0.04147552 LTC 5.89 USD 2.30 USD 3.59 USD
7 days 0.29032864 LTC 41.23 USD 16.13 USD 25.10 USD
30 days 1.24426560 LTC 176.69 USD 69.12 USD 107.57 USD
At 12c kWh and 1250w and 300mh and $142 LTC price a KNC Titan gets below:
-$0.07 per day for a 300mh KNC Titan (Sob!)
24 hours 0.02488531 LTC 3.53 USD 3.60 USD -0.07 USD
7 days 0.17419718 LTC 24.74 USD 25.20 USD -0.46 USD
30 days 0.74655936 LTC 106.01 USD 108.00 USD -1.99 USD
So man, do we need a pump in price for all the above reasons. I expect another slash in price for the L3+ on the Bitmain site,
but being Bitmain (let them eat cake!) I could be wrong.
Damn, ugly out there in the Universe of Scrypt-Pow...applied to LTC anyway...