Thank you for your reply.
Offcource i could lower the system watt requierement from 60 Watt to 20 Wattt when i buy a multi PCIe board.
But even without the 60 from the system i would be 0,02€ in minus.
My goal is not to earn pennies :-) i need at least twice of the powercost so aas example (4,5€ = ~ 2,5€ Win per day) to get a Roi of 100 days for the graphicard (250€).
I planned to invste 1600€ in graphiccard mining. So i made a test first if it could be profitable.
But it is not :-( .
In germany we have a terror goverment ;-) which tripple taxed the powercost ! all taxes togever are ~66%
It is impossible to get a Kilwatt under 0,20 cent (0,27$) and not even with 50000kw/h per year offers.
With the price that you are having to pay for power, it is unlikely that you will ever be in a position to make money by mining altcoins with gpus.
You are paying twice what most miners are paying.
The only thing that you can do is to try to find an additional value stream from your mining.
If you are lucky, you live in an older home in one of the colder parts of Germany and you can run your gpu in the winter time and reduce your heating bills. Effectively lowering your power cost.
You could also try to set up water cooling on your gpu and, with an indirect heating cylinder, use the hot water to heat up your domestic water supply. If you live in rented accommodation the hot water idea is probably not an option.
While those options might work for you, they are limited you can only use GPU heat to defray your existing heat requirements. To scale it into enough GPUs to make real money, you would have to own a whole apartment block and make everyone pay you for the warm air and hot water.
